Unrated severityNVD Advisory· Published Nov 28, 2023· Updated Jun 5, 2025

CVE-2023-35136

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Quagga (software)/Quaggallm-fuzzy
Zyxel/ATP seriescpe-rescue
Range: versions 4.32 through 5.37
Zyxel/USG20(W)-VPN seriescpe-rescue
Range: versions 4.16 through 5.37
Zyxel/USG FLEX seriescpe-rescue2 versions
versions 4.16 through 5.37+ 1 more
- (no CPE)range: versions 4.16 through 5.37
- (no CPE)range: versions 4.50 through 5.37
Zyxel/VPN seriescpe-rescue
Range: versions 4.30 through 5.37

Patches

Vulnerability mechanics

References

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

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