CVE-2026-51670

Unauthenticated Access to Upgrade Status in TOTOLINK T6 Firmware

Published Aug 31, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Unauthenticated Access to Upgrade Status in TOTOLINK T6 Firmware
Type Values Removed Values Added
Title Unauthenticated Access to Slave Upgrade Status in TOTOLINK T6 4.1.5cu.748_B20211015
Weaknesses CWE-200
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Unauthenticated Access to Slave Upgrade Status in TOTOLINK T6 4.1.5cu.748_B20211015
Weaknesses CWE-200
CWE-284
Type Values Removed Values Added
First Time appeared Totolink
Totolink t6
Vendors & Products Totolink
Totolink t6
Type Values Removed Values Added
Description 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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 1, 2026, 12:45 PM
Reserved
Jun 8, 2026, 12:00 AM
Status
Deferred
Published
Aug 31, 2026, 2:17 PM
Modified
Sep 1, 2026, 1:19 PM