CVE-2023-35136

State: Published
Severity: 5.5 Medium
Published: Nov 28, 2023
Updated: Jun 5, 2025
Reserved: Jun 14, 2023

Description

An improper input validation vulnerability in the “Quagga” package of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 through 5.37, USG20(W)-VPN series firmware versions 4.16 through 5.37, and VPN series firmware versions 4.30 through 5.37, could allow an authenticated local attacker to access configuration files on an affected device.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	Zyxel

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
ATP series firmwareZyxel	versions 4.32 through 5.37Affected
USG FLEX series firmwareZyxel	versions 4.50 through 5.37Affected
USG FLEX 50(W) series firmwareZyxel	versions 4.16 through 5.37Affected
USG20(W)-VPN series firmwareZyxel	versions 4.16 through 5.37Affected
VPN series firmwareZyxel	versions 4.30 through 5.37Affected

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-apsvendor-advisory

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