CVEvulnerability

CVE-2026-36603

8.1 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)
8.1 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-306

Description

Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 exposes 15 of 18 UPnP IGD actions without authentication on port 1900, including AddPortMapping and GetExternalIPAddress. UPnP is enabled by default through the admin interface, allowing any unauthenticated LAN device to create arbitrary port forwarding rules and access WAN traffic statistics.

Related

Weakness · CWE (1)

  • CWE-306 Missing Authentication for Critical Functionality weakness

References