CVE-2026-36609

Published June 3rd, 2026

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CVSS v3

7.3

HIGH

CVSS v2

N/A

Affected

PROJECT

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.

Tymbark7372/MERCUSYS-AC12G

15 CVEs in Mercusys AC12G (EU) V1 - 2 Critical, 4 High, 8 Medium, 1 Low

GitHub