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CVE Vulnerability Details :

CVE-2026-36603

PUBLISHED

More Info Official Page

Assigner-mitre

Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca

Published At-03 Jun, 2026 | 00:00

Updated At-05 Jun, 2026 | 02:04

▼CVE Numbering Authority (CNA)

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.

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Type	CWE ID	Description
text	N/A	n/a

Type: text

CWE ID: N/A

Description: n/a

References

Hyperlink	Resource
https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36603.md	N/A

Hyperlink: https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36603.md

Resource: N/A

▼Authorized Data Publishers (ADP)

CISA ADP Vulnrichment

Problem Types

Type	CWE ID	Description
CWE	CWE-306	CWE-306 Missing Authentication for Critical Function

Type: CWE

CWE ID: CWE-306

Description: CWE-306 Missing Authentication for Critical Function

Metrics

Version	Base score	Base severity	Vector
3.1	8.1	HIGH	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Version: 3.1

Base score: 8.1

Base severity: HIGH

Vector:

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

Affected Products

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Replaced By

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Affected Products

Problem Types

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References