High severity7.3NVD Advisory· Published Jun 3, 2026· Updated Jun 4, 2026
CVE-2026-36609
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1Patches
Vulnerability mechanics
References
1News mentions
1- Mercusys AC12G Router: 15 Vulnerabilities Disclosed on June 3, 2026Vypr Intelligence · Jun 3, 2026