Incorrect access control in the setWizardCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to reconfigure WAN,… (CVE-2026-51666)
Description
An incorrect access control vulnerability exists in the setWizardCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. This flaw allows unauthenticated attackers to reconfigure WAN, Wi-Fi, and device initialization state by sending a crafted POST request to /cgi-bin/cstecgi.cgi. No patch information is currently available, and no known exploits have been reported in the wild.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The TOTOLINK T6 router firmware 4.1.5cu.748_B20211015 contains an access control vulnerability in the setWizardCfg function. This vulnerability permits unauthenticated attackers to modify critical device configurations such as WAN settings, Wi-Fi parameters, and device initialization state via a specially crafted POST request to the /cgi-bin/cstecgi.cgi endpoint. This could potentially allow attackers to disrupt network connectivity or alter device behavior without authentication.
Potential Impact
Successful exploitation allows unauthenticated attackers to reconfigure network and device settings remotely, potentially causing denial of service, unauthorized network access changes, or device misconfiguration. No evidence of active exploitation is currently known.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the device management interface from untrusted networks and monitor for suspicious POST requests to /cgi-bin/cstecgi.cgi.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-82vp-8cqc-4mmv
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-51666"]
Threat ID: 6a95bf05acd9273b496677c9
Added to database: 08/31/2026, 17:51:01 UTC
Last enriched: 09/08/2026, 16:09:35 UTC
Last updated: 10/15/2026, 18:48:21 UTC
Views: 65
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