CVE-2026-36609_CVE-2026-36609

7.3 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

Basic Information

ID CVE-2026-36609

Source mitre

Published Jun 3, 2026 at 00:00

Modified Jun 3, 2026 at 19:38

Affected Product

Vendor n/a

Product n/a

Version n/a

Affected Versions n/a n/a n/a

CWE Classification

CWE-341 CWE-327

References

github.com /Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36609.md

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    "published": "2026-06-03T00:00:00.000Z",
    "modified": "2026-06-03T19:38:09.934Z",
    "type": "cve",
    "title": "CVE-2026-36609",
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