CVE-2023-27991

State: Published
Severity: 8.8 High
Published: Apr 24, 2023
Updated: Feb 4, 2025
Reserved: Mar 9, 2023

Description

The post-authentication command injection vulnerability in the CLI command of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker to execute some OS commands remotely.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Zyxel

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
ATP series firmwareZyxel	4.32 through 5.35Affected
USG FLEX series firmwareZyxel	4.50 through 5.35Affected
USG FLEX 50(W) firmwareZyxel	4.16 through 5.35Affected
USG20(W)-VPN firmwareZyxel	4.16 through 5.35Affected
VPN series firmwareZyxel	4.30 through 5.35Affected

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-xss-vulnerability-and-post-authentication-command-injection-vulnerability-in-firewalls

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