Vulnerability Description
Incorrect access control in the setUpgradeFW function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to trigger firmware-upgrade workflow changes via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README
- https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.m
- https://www.totolink.net/
- https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.ht
FAQ
What is CVE-2026-51689?
CVE-2026-51689 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Incorrect access control in the setUpgradeFW function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to trigger firmware-upgrade workflow changes via sending a crafted POST requ...
How severe is CVE-2026-51689?
CVE-2026-51689 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-51689?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.