CVEvulnerability

CVE-2026-36609

7.3 HIGH Published 2026-06-03 Modified 2026-07-22 Official page ↗
Status
Deferred
Published
2026-06-03
Last modified
2026-07-22
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.3 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weaknesses
CWE-327, CWE-341

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.

Related

Weakness · CWE (2)

  • CWE-327 Use of a Broken or Risky Cryptographic Algorithm weakness
  • CWE-341 Predictable from Observable State weakness

References