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NVD Vulnerability Details :
CVE-2026-36603
Deferred
More InfoOfficial Page
Source-cve@mitre.org
View Known Exploited Vulnerability (KEV) details
Published At-03 Jun, 2026 | 18:16
Updated At-05 Jun, 2026 | 02:17

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.1HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Type: Secondary
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
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-306Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-306
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36603.mdcve@mitre.org
N/A
Hyperlink: https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36603.md
Source: cve@mitre.org
Resource: N/A
Change History
0Changes found
Details not found