CVE-2026-36609 | THREATINT

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.

PUBLISHED Reserved 2026-04-06 | Published 2026-06-03 | Updated 2026-06-03 | Assigner mitre

References

github.com/...AC12G/blob/master/advisories/CVE-2026-36609.md

cve.org (CVE-2026-36609)

nvd.nist.gov (CVE-2026-36609)

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