CVE-2026-51670

Incorrect access control in the getSlaveUpdate function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to query slave upgrade status and affect upgrade bookkeeping via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

• Published Aug 31, 2026
• CVSS 9.8 critical
• 0.6% chance of exploitation in the next 30 days (EPSS)

CVE-2026-51670 at the National Vulnerability Database