Incorrect access control in the getSmartQosCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain Smart QoS… (CVE-2026-51651)
Description
An incorrect access control vulnerability exists in the getSmartQosCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. This flaw allows unauthenticated attackers to retrieve Smart QoS configuration and rules by sending a crafted POST request to the /cgi-bin/cstecgi.cgi endpoint.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in TOTOLINK T6 4.1.5cu.748_B20211015 is due to improper access control in the getSmartQosCfg function. Exploiting this issue, unauthenticated attackers can send a specially crafted POST request to the /cgi-bin/cstecgi.cgi CGI endpoint to obtain sensitive Smart QoS configuration data and rules. No CVSS score or detailed impact metrics are provided. There is no information about patches or vendor advisories indicating remediation status.
Potential Impact
An attacker without authentication can access Smart QoS configuration and rules, potentially exposing sensitive network traffic management settings. The impact is limited to disclosure of configuration data; no information about further exploitation or control is provided.
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 suspicious POST requests to /cgi-bin/cstecgi.cgi.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5mjp-g554-qr2j
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-51651"]
Threat ID: 6a92f7f7acd9273b49e8693e
Added to database: 08/29/2026, 15:17:11 UTC
Last enriched: 09/09/2026, 19:38:33 UTC
Last updated: 10/11/2026, 18:48:20 UTC
Views: 31
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