What is GHSA-wmgq-9q82-422r?

GHSA-wmgq-9q82-422r is a security advisory published by GitHub Security Advisories with High severity. Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 uses a static authentication...

Which CVE IDs does GHSA-wmgq-9q82-422r cover?

GHSA-wmgq-9q82-422r covers the following CVE IDs: CVE-2026-36609. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-wmgq-9q82-422r?

GHSA-wmgq-9q82-422r has a CVSS v3 base score of 7.3, published by GitHub Security Advisories.

GHSA-wmgq-9q82-422rHighCVSS 7.3

Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 uses a static authentication...

Vendor

GitHub Security Advisories

Published

June 3, 2026

Last Modified

June 3, 2026

🔗 CVE IDs covered (1)

CVE-2026-36609 →

📋 Description

Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 uses a static authentication nonce that does not change between requests from the same source IP. Combined with the predictable XOR-based password encoding (securityEncode function), this allows an attacker to reverse captured authentication tokens to recover the plaintext password.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-36609
https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36609.md
https://github.com/advisories/GHSA-wmgq-9q82-422r