CVE-2021-27853

Published: Sep 27, 2022Modified: Nov 4, 2025

4.7

Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Exploitability: 2.8 / Impact: 1.4

Source: NVD

Description

Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers.

Affected (100)

1 product

1 product

94 products

Catalyst 6503 E Firmware

Catalyst 6504 E Firmware

Catalyst 6506 E Firmware

Catalyst 6509 E Firmware

Catalyst 6509 Neb A Firmware

Catalyst 6509 V E Firmware

Catalyst 6513 E Firmware

Catalyst 6807 Xl Firmware

Catalyst 6840 X Firmware

Catalyst 6880 X Firmware

Catalyst C6816 X Le Firmware

Catalyst C6824 X Le 40g Firmware

Catalyst C6832 X Le Firmware

Catalyst C6840 X Le 40g Firmware

Catalyst 6800ia Firmware

Ios Xe

Meraki Ms390 Firmware

Meraki Ms210 Firmware

Meraki Ms225 Firmware

Meraki Ms250 Firmware

Meraki Ms350 Firmware

Meraki Ms355 Firmware

Meraki Ms410 Firmware

Meraki Ms420 Firmware

Meraki Ms425 Firmware

Meraki Ms450 Firmware

Nexus 93180yc Ex Firmware

Nexus 93180yc Fx Firmware

Nexus 93180yc Fx3 Firmware

Nexus 93240yc Fx2 Firmware

Nexus 93360yc Fx2 Firmware

Nexus 93120tx Firmware

Nexus 93108tc Ex Firmware

Nexus 9348gc Fxp Firmware

Nexus 93108tc Fx Firmware

Nexus 93108tc Fx3p Firmware

Nexus 93216tc Fx2 Firmware

N9k C9316d Gx Firmware

N9k C93600cd Gx Firmware

N9k C9332d Gx2b Firmware

N9k C9348d Gx2a Firmware

N9k C9364d Gx2a Firmware

N9k X97160yc Ex Firmware

N9k X9788tc Fx Firmware

N9k X9564px Firmware

N9k X9464px Firmware

N9k X9564tx Firmware

N9k X9464tx2 Firmware

Nexus 9636pq Firmware

Nexus X9636q R Firmware

Nexus 9536pq Firmware

Nexus 9432pq Firmware

Nexus 9736pq Firmware

N9k X9736c Fx Firmware

N9k X9732c Ex Firmware

N9k X9732c Fx Firmware

N9k X9736c Ex Firmware

N9k X9636c Rx Firmware

N9k X9636c R Firmware

N9k X9432c S Firmware

Nexus 9716d Gx Firmware

Nexus 9504 Firmware

Nexus 9508 Firmware

Nexus 9516 Firmware

Nexus 92160yc X Firmware

Nexus 9272q Firmware

Nexus 92304qc Firmware

Nexus 9236c Firmware

Nexus 92300yc Firmware

Nexus 92348gc X Firmware

Nexus 9364c Firmware

Nexus 9336c Fx2 Firmware

Nexus 9336c Fx2 E Firmware

Nexus 9332c Firmware

Nexus 9364c Gx Firmware

Sg500x 24mpp Firmware

Sg500x 24p Firmware

Sg500x 48 Firmware

Sg500x 48mpp Firmware

Sg500x 48p Firmware

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Ieee Ieee 802.2	Up to 802.2h-1997

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Ietf P802.1q	Up to d1.0

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6503 E Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6503 E	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6504 E Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6504 E	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6506 E Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6506 E	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6509 E Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6509 E	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6509 Neb A Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6509 Neb A	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6509 V E Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6509 V E	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6513 E Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6513 E	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6807 Xl Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6807 Xl	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6840 X Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6840 X	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6880 X Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6880 X	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst C6816 X Le Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst C6816 X Le	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst C6824 X Le 40g Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst C6824 X Le 40g	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst C6832 X Le Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst C6832 X Le	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst C6840 X Le 40g Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst C6840 X Le 40g	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Catalyst 6800ia Firmware	Version 15.5(01.01.85)sy07

Running on/with	Platform Versions
Cisco Catalyst 6800ia	All versions

Configuration R

5 vulnerable · 119 platform

Vulnerable Software	Affected Versions
Cisco Ios Xe	Version 17.3.3
Cisco Ios Xe	Version 15.2(07)e02
Cisco Ios Xe	Version 15.2(07)e03
Cisco Ios Xe	Version 17.4.1
Cisco Ios Xe	Version 17.6.1

Running on/with	Platform Versions
Cisco Catalyst 3650 12x48fd E	All versions
Cisco Catalyst 3650 12x48fd L	All versions
Cisco Catalyst 3650 12x48fd S	All versions
Cisco Catalyst 3650 12x48uq E	All versions
Cisco Catalyst 3650 12x48uq L	All versions
Cisco Catalyst 3650 12x48uq S	All versions
Cisco Catalyst 3650 12x48ur E	All versions
Cisco Catalyst 3650 12x48ur L	All versions
Cisco Catalyst 3650 12x48ur S	All versions
Cisco Catalyst 3650 12x48uz E	All versions
Cisco Catalyst 3650 12x48uz L	All versions
Cisco Catalyst 3650 12x48uz S	All versions
Cisco Catalyst 3650 24pd E	All versions
Cisco Catalyst 3650 24pd L	All versions
Cisco Catalyst 3650 24pd S	All versions
Cisco Catalyst 3650 24pdm E	All versions
Cisco Catalyst 3650 24pdm L	All versions
Cisco Catalyst 3650 24pdm S	All versions
Cisco Catalyst 3650 24ps E	All versions
Cisco Catalyst 3650 24ps L	All versions
Cisco Catalyst 3650 24ps S	All versions
Cisco Catalyst 3650 24td E	All versions
Cisco Catalyst 3650 24td L	All versions
Cisco Catalyst 3650 24td S	All versions
Cisco Catalyst 3650 24ts E	All versions
Cisco Catalyst 3650 24ts L	All versions
Cisco Catalyst 3650 24ts S	All versions
Cisco Catalyst 3650 48fd E	All versions
Cisco Catalyst 3650 48fd L	All versions
Cisco Catalyst 3650 48fd S	All versions
Cisco Catalyst 3650 48fq E	All versions
Cisco Catalyst 3650 48fq L	All versions
Cisco Catalyst 3650 48fq S	All versions
Cisco Catalyst 3650 48fqm E	All versions
Cisco Catalyst 3650 48fqm L	All versions
Cisco Catalyst 3650 48fqm S	All versions
Cisco Catalyst 3650 48fs E	All versions
Cisco Catalyst 3650 48fs L	All versions
Cisco Catalyst 3650 48fs S	All versions
Cisco Catalyst 3650 48pd E	All versions
Cisco Catalyst 3650 48pd L	All versions
Cisco Catalyst 3650 48pd S	All versions
Cisco Catalyst 3650 48pq E	All versions
Cisco Catalyst 3650 48pq L	All versions
Cisco Catalyst 3650 48pq S	All versions
Cisco Catalyst 3650 48ps E	All versions
Cisco Catalyst 3650 48ps L	All versions
Cisco Catalyst 3650 48ps S	All versions
Cisco Catalyst 3650 48td E	All versions
Cisco Catalyst 3650 48td L	All versions
Cisco Catalyst 3650 48td S	All versions
Cisco Catalyst 3650 48tq E	All versions
Cisco Catalyst 3650 48tq L	All versions
Cisco Catalyst 3650 48tq S	All versions
Cisco Catalyst 3650 48ts E	All versions
Cisco Catalyst 3650 48ts L	All versions
Cisco Catalyst 3650 48ts S	All versions
Cisco Catalyst 3650 8x24pd E	All versions
Cisco Catalyst 3650 8x24pd L	All versions
Cisco Catalyst 3650 8x24pd S	All versions
Cisco Catalyst 3650 8x24uq E	All versions
Cisco Catalyst 3650 8x24uq L	All versions
Cisco Catalyst 3650 8x24uq S	All versions
Cisco Catalyst 3850 12s E	All versions
Cisco Catalyst 3850 12s S	All versions
Cisco Catalyst 3850 12xs E	All versions
Cisco Catalyst 3850 12xs S	All versions
Cisco Catalyst 3850 16xs E	All versions
Cisco Catalyst 3850 16xs S	All versions
Cisco Catalyst 3850 24p E	All versions
Cisco Catalyst 3850 24p L	All versions
Cisco Catalyst 3850 24pw S	All versions
Cisco Catalyst 3850 24s E	All versions
Cisco Catalyst 3850 24s S	All versions
Cisco Catalyst 3850 24t E	All versions
Cisco Catalyst 3850 24t L	All versions
Cisco Catalyst 3850 24t S	All versions
Cisco Catalyst 3850 24u E	All versions
Cisco Catalyst 3850 24u L	All versions
Cisco Catalyst 3850 24u S	All versions
Cisco Catalyst 3850 24xs E	All versions
Cisco Catalyst 3850 24xs S	All versions
Cisco Catalyst 3850 24xu E	All versions
Cisco Catalyst 3850 24xu L	All versions
Cisco Catalyst 3850 24xu S	All versions
Cisco Catalyst 3850 32xs E	All versions
Cisco Catalyst 3850 32xs S	All versions
Cisco Catalyst 3850 48f E	All versions
Cisco Catalyst 3850 48f L	All versions
Cisco Catalyst 3850 48f S	All versions
Cisco Catalyst 3850 48p E	All versions
Cisco Catalyst 3850 48p L	All versions
Cisco Catalyst 3850 48p S	All versions
Cisco Catalyst 3850 48pw S	All versions
Cisco Catalyst 3850 48t E	All versions
Cisco Catalyst 3850 48t L	All versions
Cisco Catalyst 3850 48t S	All versions
Cisco Catalyst 3850 48u E	All versions
Cisco Catalyst 3850 48u L	All versions
Cisco Catalyst 3850 48u S	All versions
Cisco Catalyst 3850 48xs E	All versions
Cisco Catalyst 3850 48xs F E	All versions
Cisco Catalyst 3850 48xs F S	All versions
Cisco Catalyst 3850 48xs S	All versions
Cisco Catalyst 9200	All versions
Cisco Catalyst 9200cx	All versions
Cisco Catalyst 9200l	All versions
Cisco Catalyst 9300	All versions
Cisco Catalyst 9300l	All versions
Cisco Catalyst 9300lm	All versions
Cisco Catalyst 9300x	All versions
Cisco Catalyst 9400	All versions
Cisco Catalyst 9500	All versions
Cisco Catalyst 9500h	All versions
Cisco Catalyst 9600	All versions
Cisco Catalyst 9600x	All versions
Cisco Catalyst C3850 12x48u E	All versions
Cisco Catalyst C3850 12x48u L	All versions
Cisco Catalyst C3850 12x48u S	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms390 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms390	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms210 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms210	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms225 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms225	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms250 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms250	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms350 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms350	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms355 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms355	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms410 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms410	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms420 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms420	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms425 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms425	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Meraki Ms450 Firmware	All versions

Running on/with	Platform Versions
Cisco Meraki Ms450	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93180yc Ex Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93180yc Ex	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93180yc Fx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93180yc Fx	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93180yc Fx3 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93180yc Fx3	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93240yc Fx2 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93240yc Fx2	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93360yc Fx2 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93360yc Fx2	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93120tx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93120tx	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93108tc Ex Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93108tc Ex	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9348gc Fxp Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9348gc Fxp	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93108tc Fx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93108tc Fx	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93108tc Fx3p Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93108tc Fx3p	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 93216tc Fx2 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 93216tc Fx2	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k C9316d Gx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k C9316d Gx	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k C93600cd Gx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k C93600cd Gx	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k C9332d Gx2b Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k C9332d Gx2b	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k C9348d Gx2a Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k C9348d Gx2a	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k C9364d Gx2a Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k C9364d Gx2a	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X97160yc Ex Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X97160yc Ex	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9788tc Fx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9788tc Fx	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9564px Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9564px	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9464px Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9464px	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9564tx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9564tx	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9464tx2 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9464tx2	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9636pq Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9636pq	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus X9636q R Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus X9636q R	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9536pq Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9536pq	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9432pq Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9432pq	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9736pq Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9736pq	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9736c Fx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9736c Fx	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9732c Ex Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9732c Ex	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9732c Fx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9732c Fx	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9736c Ex Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9736c Ex	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9636c Rx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9636c Rx	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9636c R Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9636c R	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco N9k X9432c S Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco N9k X9432c S	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9716d Gx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9716d Gx	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9504 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9504	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9508 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9508	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9516 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9516	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 92160yc X Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 92160yc X	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9272q Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9272q	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 92304qc Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 92304qc	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9236c Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9236c	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 92300yc Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 92300yc	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 92348gc X Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 92348gc X	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9364c Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9364c	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9336c Fx2 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9336c Fx2	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9336c Fx2 E Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9336c Fx2 E	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9332c Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9332c	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9364c Gx Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9364c Gx	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Nexus 9800 Firmware	Version 9.3(5)

Running on/with	Platform Versions
Cisco Nexus 9800	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sf500 24 Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sf500 24	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sf 500 24mp Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sf 500 24mp	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sf500 24p Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sf500 24p	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sf500 48 Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sf500 48	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sf500 48mp Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sf500 48mp	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sf500 18p Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sf500 18p	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500 28 Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500 28	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500 28mpp Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500 28mpp	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500 28p Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500 28p	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500 52 Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500 52	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500 52mp Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500 52mp	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500 52p Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500 52p	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500x 24 Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500x 24	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500x 24mpp Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500x 24mpp	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500x 24p Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500x 24p	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500x 48 Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500x 48	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500x 48mpp Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500x 48mpp	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Cisco Sg500x 48p Firmware	Version 3.0.0.61

Running on/with	Platform Versions
Cisco Sg500x 48p	All versions

Related CWEs

CWE-290

Authentication Bypass by Spoofing

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

References (13)

https://blog.champtar.fr/VLAN0_LLC_SNAP/

Source: cret@cert.org

ExploitThird Party Advisory

https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/

Source: cret@cert.org

Technical DescriptionThird Party Advisory

https://kb.cert.org/vuls/id/855201

Source: cret@cert.org

Third Party AdvisoryUS Government Resource

https://standards.ieee.org/ieee/802.1Q/10323/

Source: cret@cert.org

Vendor Advisory

https://standards.ieee.org/ieee/802.2/1048/

Source: cret@cert.org

Vendor Advisory

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-VU855201-J3z8CKTX

Source: cret@cert.org

Third Party Advisory

https://blog.champtar.fr/VLAN0_LLC_SNAP/