CVE-2026-51656: n/a
Description
Incorrect access control in the getVpnPassCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain VPN pass-through and WAN ping filter settings via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
CVSS v3.1
Score 4.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-51656 affects TOTOLINK T6 firmware 4.1.5cu.748_B20211015. It is caused by improper access control in the getVpnPassCfg function, which can be exploited by unauthenticated attackers to obtain VPN pass-through and WAN ping filter settings. The attack vector requires sending a crafted POST request to the /cgi-bin/cstecgi.cgi endpoint. The CVSS v3.1 base score is 4.3, reflecting a medium severity with low complexity and no privileges required.
Potential Impact
An attacker can obtain VPN pass-through and WAN ping filter settings without authentication, potentially revealing sensitive network configuration details. There is no impact on integrity or availability according to the CVSS vector. This information disclosure could aid further attacks but does not directly compromise system control or availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround is currently documented. Users should monitor vendor communications for updates and consider restricting access to the affected endpoint if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6a91e409acd9273b4942e7bd
Added to database: 08/28/2026, 19:39:53 UTC
Last enriched: 09/07/2026, 14:31:45 UTC
Last updated: 10/13/2026, 18:48:21 UTC
Views: 42
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