Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 allows unauthenticated brute-force attacks via the TDDP password change endpoint (code=10), which lacks the rate limiting applied to the login endpoint (code=7). An attacker on the adjacent network can attempt unlimited passwords without triggering account lockout.
History

Wed, 03 Jun 2026 21:15:00 +0000

Type Values Removed Values Added
Title Unauthenticated Brute‑Force via Unrestricted Password Change Endpoint on Mercusys AC12G Router
Weaknesses CWE-400

Wed, 03 Jun 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 03 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
Title Unauthenticated Brute‑Force via Unrestricted Password Change Endpoint on Mercusys AC12G Router
Weaknesses CWE-307
CWE-400

Wed, 03 Jun 2026 17:45:00 +0000

Type Values Removed Values Added
Description Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 allows unauthenticated brute-force attacks via the TDDP password change endpoint (code=10), which lacks the rate limiting applied to the login endpoint (code=7). An attacker on the adjacent network can attempt unlimited passwords without triggering account lockout.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-06-03T18:31:26.060Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-36607

cve-icon Vulnrichment

Updated: 2026-06-03T18:31:23.385Z

cve-icon NVD

Status : Received

Published: 2026-06-03T18:16:21.797

Modified: 2026-06-03T19:16:32.030

Link: CVE-2026-36607

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-03T21:00:06Z