CVE-2026-36611: n/a
Mercusys AC12G (EU) V1 router firmware AC12G(EU)_V1_200909 has a vulnerability where it returns 128 bytes of uninitialized memory when processing POST requests lacking the SOAPAction header on the UPnP port 1900. This behavior exposes internal memory contents to unauthenticated attackers on adjacent networks. No patch or official remediation guidance is currently available, and no known exploits have been reported in the wild. The vulnerability could potentially leak sensitive information from device memory, but the exact impact is not detailed.
AI Analysis
Technical Summary
The Mercusys AC12G (EU) V1 router with firmware version AC12G(EU)_V1_200909 is vulnerable to information disclosure due to returning 128 bytes of uninitialized buffer memory when receiving POST requests without the SOAPAction header on the UPnP port 1900. This allows unauthenticated attackers on the same local network to access internal memory contents. The vulnerability is published as CVE-2026-36611, with no CVSS score or vendor remediation information available at this time.
Potential Impact
This vulnerability exposes internal memory contents of the affected device to unauthenticated adjacent network attackers, potentially leaking sensitive information stored in memory buffers. The exact nature and sensitivity of the leaked data are not specified. No known exploits have been reported, so the real-world impact is currently unknown.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, network administrators should consider disabling UPnP on the affected device if possible or restrict access to the UPnP port 1900 to trusted devices only to reduce exposure.
CVE-2026-36611: n/a
Description
Mercusys AC12G (EU) V1 router firmware AC12G(EU)_V1_200909 has a vulnerability where it returns 128 bytes of uninitialized memory when processing POST requests lacking the SOAPAction header on the UPnP port 1900. This behavior exposes internal memory contents to unauthenticated attackers on adjacent networks. No patch or official remediation guidance is currently available, and no known exploits have been reported in the wild. The vulnerability could potentially leak sensitive information from device memory, but the exact impact is not detailed.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Mercusys AC12G (EU) V1 router with firmware version AC12G(EU)_V1_200909 is vulnerable to information disclosure due to returning 128 bytes of uninitialized buffer memory when receiving POST requests without the SOAPAction header on the UPnP port 1900. This allows unauthenticated attackers on the same local network to access internal memory contents. The vulnerability is published as CVE-2026-36611, with no CVSS score or vendor remediation information available at this time.
Potential Impact
This vulnerability exposes internal memory contents of the affected device to unauthenticated adjacent network attackers, potentially leaking sensitive information stored in memory buffers. The exact nature and sensitivity of the leaked data are not specified. No known exploits have been reported, so the real-world impact is currently unknown.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, network administrators should consider disabling UPnP on the affected device if possible or restrict access to the UPnP port 1900 to trusted devices only to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-04-06T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a20657ce29bf47b50d4100b
Added to database: 6/3/2026, 5:33:48 PM
Last enriched: 6/3/2026, 5:49:07 PM
Last updated: 6/3/2026, 6:36:47 PM
Views: 3
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