CVE-2026-36613: n/a
Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 has a vulnerability where it returns 128 bytes of uninitialized internal buffer data in response to HTTP POST requests to undefined paths. This behavior exposes server state information to unauthenticated attackers on adjacent networks. The vulnerability has a CVSS score of 4.3, indicating medium severity. No patch or official remediation information is currently available.
AI Analysis
Technical Summary
The Mercusys AC12G (EU) V1 router running firmware AC12G(EU)_V1_200909 is vulnerable to an information exposure issue. When the device receives HTTP POST requests to undefined paths, it responds with 128 bytes of uninitialized internal buffer contents. This can leak server state information to unauthenticated attackers who are on an adjacent network. The vulnerability is classified under CWE-125 (Out-of-bounds Read). There is no known patch or vendor advisory specifying remediation at this time.
Potential Impact
The vulnerability allows an unauthenticated attacker on an adjacent network to obtain 128 bytes of potentially sensitive internal memory from the device. This information disclosure could aid in further attacks or reconnaissance but does not directly impact integrity or availability. The CVSS score of 4.3 reflects a limited confidentiality impact with no integrity or availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit access to the device's management interface to trusted networks and monitor for unusual HTTP POST requests to undefined paths. No official remediation or temporary fix is currently documented.
CVE-2026-36613: n/a
Description
Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 has a vulnerability where it returns 128 bytes of uninitialized internal buffer data in response to HTTP POST requests to undefined paths. This behavior exposes server state information to unauthenticated attackers on adjacent networks. The vulnerability has a CVSS score of 4.3, indicating medium severity. No patch or official remediation information is currently available.
CVSS v3.1
Score 4.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Mercusys AC12G (EU) V1 router running firmware AC12G(EU)_V1_200909 is vulnerable to an information exposure issue. When the device receives HTTP POST requests to undefined paths, it responds with 128 bytes of uninitialized internal buffer contents. This can leak server state information to unauthenticated attackers who are on an adjacent network. The vulnerability is classified under CWE-125 (Out-of-bounds Read). There is no known patch or vendor advisory specifying remediation at this time.
Potential Impact
The vulnerability allows an unauthenticated attacker on an adjacent network to obtain 128 bytes of potentially sensitive internal memory from the device. This information disclosure could aid in further attacks or reconnaissance but does not directly impact integrity or availability. The CVSS score of 4.3 reflects a limited confidentiality impact with no integrity or availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit access to the device's management interface to trusted networks and monitor for unusual HTTP POST requests to undefined paths. No official remediation or temporary fix is currently documented.
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: 6a20657ce29bf47b50d41011
Added to database: 6/3/2026, 5:33:48 PM
Last enriched: 6/10/2026, 7:42:44 PM
Last updated: 6/18/2026, 4:42:38 AM
Views: 32
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