CVE-2026-51693: n/a
Description
CVE-2026-51693 is a critical vulnerability in TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It involves incorrect access control in the setVpnPassCfg function, allowing unauthenticated attackers to weaken edge filtering by sending a crafted POST request to /cgi-bin/cstecgi.cgi.
CVSS v3.1
Score 9.8critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in TOTOLINK T6 4.1.5cu.748_B20211015 stems from improper access control in the setVpnPassCfg function. An unauthenticated attacker can exploit this flaw by sending a specially crafted POST request to the /cgi-bin/cstecgi.cgi endpoint, which results in the weakening of edge filtering mechanisms. The CVSS v3.1 score is 9.8, indicating critical severity with network attack vector, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an unauthenticated attacker to bypass or weaken edge filtering controls, potentially leading to full compromise of the device's confidentiality, integrity, and availability.
Mitigation Recommendations
No patch or official fix information is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, 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-4pvw-j7mm-g95w
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-51693"]
Threat ID: 6a95befeacd9273b496676de
Added to database: 08/31/2026, 17:50:54 UTC
Last enriched: 09/07/2026, 23:22:37 UTC
Last updated: 10/13/2026, 18:48:21 UTC
Views: 62
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