CVE-2026-51721: n/a
Description
Incorrect access control in the setPairCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to alter the mesh pairing state via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
CVSS v3.1
Score 9.1critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from improper access control in the setPairCfg function of TOTOLINK T6 firmware 4.1.5cu.748_B20211015. An attacker can exploit this by sending a specially crafted POST request to the /cgi-bin/cstecgi.cgi endpoint, enabling them to modify the mesh pairing state without authentication. The CVSS v3.1 base score is 9.1, reflecting high impact on confidentiality and integrity with no required privileges or user interaction.
Potential Impact
Successful exploitation allows an unauthenticated attacker to change the mesh pairing state of the device, potentially compromising network configuration and security. The vulnerability impacts confidentiality and integrity but does not affect availability. This could lead to unauthorized network access or manipulation of mesh network behavior.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been published at this time. Until a patch is available, restrict network access to the device's management interface and monitor for suspicious POST requests targeting /cgi-bin/cstecgi.cgi.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6a95b4e5acd9273b495cdc93
Added to database: 08/31/2026, 17:07:49 UTC
Last enriched: 09/07/2026, 14:55:25 UTC
Last updated: 10/13/2026, 18:48:21 UTC
Views: 47
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