CVE-2021-34983

Published: May 7, 2024Modified: Aug 14, 2025

6.5

Vector

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability: 2.8 / Impact: 3.6

Source: zdi-disclosures@trendmicro.com (Secondary)

Description

NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of authentication prior to allowing access to system configuration information. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-13708.

Affected (52)

Products: Netgear: Xr1000 Firmware, Xr300 Firmware, D6220 Firmware, D6400 Firmware, D7000v2 Firmware, Dgn2200v4 Firmware, V6510 1fxaus Firmware, Dc112a Firmware, Ex3700 Firmware, Ex3800 Firmware, Ex6120 Firmware, Ex6130 Firmware, Ex7000 Firmware, Ex7500 Firmware, Mr60 Firmware, Mr80 Firmware, Ms60 Firmware, Ms80 Firmware, Lax20 Firmware, R6400 Firmware, R6400v2 Firmware, R6700v3 Firmware, R6900p Firmware, R7000 Firmware, R7000p Firmware, R7100lg Firmware, R7850 Firmware, R7900p Firmware, R7960p Firmware, R8000 Firmware, R8000p Firmware, R8300 Firmware, R8500 Firmware, Rax15 Firmware, Rax20 Firmware, Rax200 Firmware, Rax35v2 Firmware, Rax38v2 Firmware, Rax40v2 Firmware, Rax42 Firmware, Rax43 Firmware, Rax45 Firmware, Rax48 Firmware, Rax50 Firmware, Rax50s Firmware, Rax75 Firmware, Rax80 Firmware, Raxe450 Firmware, Raxe500 Firmware, Rs400 Firmware, Wndr3400v3 Firmware, Wnr3500lv2 Firmware

52 products

V6510 1fxaus Firmware

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Xr1000 Firmware	Before 1.0.0.64

Running on/with	Platform Versions
Netgear Xr1000	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Xr300 Firmware	Before 1.0.3.68

Running on/with	Platform Versions
Netgear Xr300	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear D6220 Firmware	Before 1.0.0.76

Running on/with	Platform Versions
Netgear D6220	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear D6400 Firmware	Before 1.0.0.108

Running on/with	Platform Versions
Netgear D6400	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear D7000v2 Firmware	Before 1.0.0.76

Running on/with	Platform Versions
Netgear D7000v2	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Dgn2200v4 Firmware	Before 1.0.0.126

Running on/with	Platform Versions
Netgear Dgn2200v4	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear V6510 1fxaus Firmware	Before 1.0.0.80

Running on/with	Platform Versions
Netgear V6510 1fxaus	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Dc112a Firmware	Before 1.0.0.62

Running on/with	Platform Versions
Netgear Dc112a	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ex3700 Firmware	Before 1.0.0.94

Running on/with	Platform Versions
Netgear Ex3700	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ex3800 Firmware	Before 1.0.0.94

Running on/with	Platform Versions
Netgear Ex3800	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ex6120 Firmware	Before 1.0.0.66

Running on/with	Platform Versions
Netgear Ex6120	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ex6130 Firmware	Before 1.0.0.46

Running on/with	Platform Versions
Netgear Ex6130	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ex7000 Firmware	Before 1.0.1.106

Running on/with	Platform Versions
Netgear Ex7000	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ex7500 Firmware	Before 1.0.1.76

Running on/with	Platform Versions
Netgear Ex7500	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Mr60 Firmware	Before 1.1.6.122

Running on/with	Platform Versions
Netgear Mr60	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Mr80 Firmware	Before 1.1.6.10

Running on/with	Platform Versions
Netgear Mr80	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ms60 Firmware	Before 1.1.6.122

Running on/with	Platform Versions
Netgear Ms60	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ms80 Firmware	Before 1.1.6.10

Running on/with	Platform Versions
Netgear Ms80	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Lax20 Firmware	Before 1.1.6.30

Running on/with	Platform Versions
Netgear Lax20	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6400 Firmware	Before 1.0.1.76

Running on/with	Platform Versions
Netgear R6400	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6400v2 Firmware	Before 1.0.4.120

Running on/with	Platform Versions
Netgear R6400v2	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6700v3 Firmware	Before 1.0.4.120

Running on/with	Platform Versions
Netgear R6700v3	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6900p Firmware	Before 1.3.3.148

Running on/with	Platform Versions
Netgear R6900p	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7000 Firmware	Before 1.0.11.128

Running on/with	Platform Versions
Netgear R7000	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7000p Firmware	Before 1.3.3.148

Running on/with	Platform Versions
Netgear R7000p	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7100lg Firmware	Before 1.0.0.72

Running on/with	Platform Versions
Netgear R7100lg	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7850 Firmware	Before 1.0.5.76

Running on/with	Platform Versions
Netgear R7850	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7900p Firmware	Before 1.4.2.84

Running on/with	Platform Versions
Netgear R7900p	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7960p Firmware	Before 1.4.2.84

Running on/with	Platform Versions
Netgear R7960p	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R8000 Firmware	Before 1.0.4.76

Running on/with	Platform Versions
Netgear R8000	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R8000p Firmware	Before 1.4.2.84

Running on/with	Platform Versions
Netgear R8000p	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R8300 Firmware	Before 1.0.2.156

Running on/with	Platform Versions
Netgear R8300	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R8500 Firmware	Before 1.0.2.156

Running on/with	Platform Versions
Netgear R8500	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax15 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax15	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax20 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax20	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax200 Firmware	Before 1.0.5.132

Running on/with	Platform Versions
Netgear Rax200	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax35v2 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax35v2	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax38v2 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax38v2	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax40v2 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax40v2	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax42 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax42	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax43 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax43	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax45 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax45	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax48 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax48	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax50 Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax50	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax50s Firmware	Before 1.0.4.100

Running on/with	Platform Versions
Netgear Rax50s	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax75 Firmware	Before 1.0.5.132

Running on/with	Platform Versions
Netgear Rax75	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rax80 Firmware	Before 1.0.5.132

Running on/with	Platform Versions
Netgear Rax80	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Raxe450 Firmware	Before 1.0.8.70

Running on/with	Platform Versions
Netgear Raxe450	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Raxe500 Firmware	Before 1.0.8.70

Running on/with	Platform Versions
Netgear Raxe500	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Rs400 Firmware	Before 1.5.1.80

Running on/with	Platform Versions
Netgear Rs400	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Wndr3400v3 Firmware	Before 1.0.1.42

Running on/with	Platform Versions
Netgear Wndr3400v3	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Wnr3500lv2 Firmware	Before 1.2.0.70

Running on/with	Platform Versions
Netgear Wnr3500lv2	All versions

Related CWEs

CWE-306

Missing Authentication for Critical Function

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

References (4)

https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and-DSL-Modem-Routers-PSV-2021-0159

Source: zdi-disclosures@trendmicro.com

Vendor Advisory

https://www.zerodayinitiative.com/advisories/ZDI-21-1275/

Source: zdi-disclosures@trendmicro.com

Third Party Advisory

https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and-DSL-Modem-Routers-PSV-2021-0159

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://www.zerodayinitiative.com/advisories/ZDI-21-1275/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.