CVE-2026-51668: TOTOLINK T6 · Improper Access Control
Source CVE Database V5
Not known to be exploited · CVSS 7.5 High.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 31 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Until an official fix is available, restrict network access to the device's management interface to trusted users only and monitor for suspicious POST requests targeting /cgi-bin/cstecgi.cgi. Avoid exposing the device management interface to untrusted networks.
Description
Incorrect access control in the setLanguageCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to modify language configuration via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
References
- totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html (opens in a new tab)
- totolink.net (opens in a new tab)
- github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md (opens in a new tab)
- github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md (opens in a new tab)