Access Control Flaw in TOTOLINK Product Allows Exploitation by Unauthenticated Attackers
CVE-2026-51669

9.1CRITICAL

Key Information:

Vendor

TOTOLINK
Status
T6
Vendor
CVE Published:
31 August 2026

What is CVE-2026-51669?

An access control vulnerability has been identified in the getPairCfg function of the TOTOLINK T6 version 4.1.5cu.748_B20211015. This flaw allows unauthenticated attackers to issue a specially crafted POST request to the '/cgi-bin/cstecgi.cgi' endpoint, which can lead to unauthorized access to pairing and mesh-slave configuration information. Without proper access controls, this vulnerability enables potential exploitation that jeopardizes device integrity and user privacy.

References

https://www.totolink.net/home/menu/detail/menu_listtpl/do...
https://www.totolink.net/
https://github.com/DarkBoulder/CVE-Vendor-Coordination/bl...

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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