CVE-2026-51689

CriticalCVSS 9.1/10Last modified Sep 2, 2026

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.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Weakness enumeration

CWE-284

Affected software

No affected versions have been published.

Timeline

Published
Aug 31, 2026
Last modified
Sep 2, 2026
NVD status
Deferred

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CVE-2026-51689: Critical severity, CVSS 9.1 | Vulnix