CVE-2023-28771

Published: Apr 25, 2023Modified: Oct 27, 2025CISA KEV

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: NVD (Secondary)

Description

Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.

Affected (21)

Products: Zyxel: Atp100 Firmware, Atp100w Firmware, Atp200 Firmware, Atp500 Firmware, Atp700 Firmware, Atp800 Firmware, Usg Flex 100 Firmware, Usg Flex 100w Firmware, Usg Flex 200 Firmware, Usg Flex 50 Firmware, Usg Flex 500 Firmware, Usg Flex 50w Firmware, Usg Flex 700 Firmware, Vpn100 Firmware, Vpn1000 Firmware, Vpn300 Firmware, Vpn50 Firmware, Zywall Usg 310 Firmware, Zywall Usg 100 Firmware

19 products

Usg Flex 100 Firmware

Usg Flex 100w Firmware

Usg Flex 200 Firmware

Usg Flex 50 Firmware

Usg Flex 500 Firmware

Usg Flex 50w Firmware

Usg Flex 700 Firmware

Zywall Usg 310 Firmware

Zywall Usg 100 Firmware

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Atp100 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Atp100	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Atp100w Firmware	From 4.60 to 5.35

Running on/with	Platform Versions
Zyxel Atp100w	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Atp200 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Atp200	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Atp500 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Atp500	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Atp700 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Atp700	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Atp800 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Atp800	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Usg Flex 100 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Usg Flex 100	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Usg Flex 100w Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Usg Flex 100w	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Usg Flex 200 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Usg Flex 200	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Usg Flex 50 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Usg Flex 50	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Usg Flex 500 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Usg Flex 500	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Usg Flex 50w Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Usg Flex 50w	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Usg Flex 700 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Usg Flex 700	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Vpn100 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Vpn100	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Vpn1000 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Vpn1000	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Vpn300 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Vpn300	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Vpn50 Firmware	From 4.60 to 5.36

Running on/with	Platform Versions
Zyxel Vpn50	All versions

Configuration R

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Zywall Usg 310 Firmware	From 4.60 to 4.73
Zyxel Zywall Usg 310 Firmware	Version 4.73

Running on/with	Platform Versions
Zyxel Zywall Usg 310	All versions

Configuration S

2 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Zyxel Zywall Usg 100 Firmware	From 4.60 to 4.73
Zyxel Zywall Usg 100 Firmware	Version 4.73

Running on/with	Platform Versions
Zyxel Zywall Usg 100	All versions

Related CWEs

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

References (5)

http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html

Source: security@zyxel.com.tw

ExploitThird Party Advisory

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls

Source: security@zyxel.com.tw

Vendor Advisory

http://packetstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.html

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

ExploitThird Party Advisory

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls

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

Vendor Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

Timeline

No history available yet.