Incorrect access control in the setLanCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to alter LAN network… (CVE-2026-51683)
Description
An incorrect access control vulnerability exists in the setLanCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. This flaw allows unauthenticated attackers to modify the LAN network configuration by sending a specially crafted POST request to the /cgi-bin/cstecgi.cgi endpoint.
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 setLanCfg function. Due to improper validation, unauthenticated attackers can send crafted POST requests to the /cgi-bin/cstecgi.cgi CGI endpoint to alter LAN network settings without authentication. This could lead to unauthorized network configuration changes.
Potential Impact
An attacker can alter LAN network configuration without authentication, potentially disrupting network operations or redirecting traffic. No information about exploitation in the wild or additional impacts is available.
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 to trusted networks and monitor for unauthorized configuration changes.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-mv58-mpg3-3mmp
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-51683"]
Threat ID: 6a95befdacd9273b496676a6
Added to database: 08/31/2026, 17:50:53 UTC
Last enriched: 09/08/2026, 16:37:47 UTC
Last updated: 10/16/2026, 18:48:21 UTC
Views: 29
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