Incorrect access control in the setWiFiGuestCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to establish or… (CVE-2026-51692)
Description
An incorrect access control vulnerability exists in the setWiFiGuestCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. This flaw allows unauthenticated attackers to send crafted POST requests to the /cgi-bin/cstecgi.cgi endpoint to establish or weaken guest wireless access settings without proper authorization.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The TOTOLINK T6 device running firmware 4.1.5cu.748_B20211015 contains an access control vulnerability in the setWiFiGuestCfg function. Unauthenticated attackers can exploit this by sending specially crafted POST requests to the /cgi-bin/cstecgi.cgi CGI endpoint, enabling them to modify guest Wi-Fi configurations. This could allow attackers to establish guest wireless access or weaken existing guest network security controls.
Potential Impact
The vulnerability allows unauthorized modification of guest wireless access settings, potentially enabling attackers to gain unauthorized network access or degrade guest network security. No evidence of active exploitation in the wild is reported.
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 and monitor for suspicious POST requests targeting /cgi-bin/cstecgi.cgi.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-2x6c-v7m7-w2w9
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-51692"]
Threat ID: 6a95befeacd9273b496676e4
Added to database: 08/31/2026, 17:50:54 UTC
Last enriched: 09/08/2026, 16:23:14 UTC
Last updated: 10/14/2026, 06:48:18 UTC
Views: 65
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.