Incorrect access control in the getDdnsCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain DDNS… (CVE-2026-51630)
Description
An incorrect access control vulnerability exists in the getDdnsCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. This flaw allows unauthenticated attackers to retrieve DDNS configuration details, including domain, username, and password, by sending a crafted POST request to /cgi-bin/cstecgi.cgi. The vulnerability has a medium severity rating with a CVSS score of 4.3.
CVSS v3.1
Score 4.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-51630 is an access control vulnerability in the getDdnsCfg function of TOTOLINK T6 firmware 4.1.5cu.748_B20211015. Due to improper access control, unauthenticated attackers can send a crafted POST request to the /cgi-bin/cstecgi.cgi endpoint and obtain sensitive DDNS configuration information such as domain, username, and password. This vulnerability is classified under CWE-284 (Improper Access Control). No patch or remediation information is currently provided.
Potential Impact
An attacker without authentication can access sensitive DDNS configuration data, including credentials, potentially compromising the device's dynamic DNS settings. This exposure could lead to further unauthorized access or manipulation of network configurations. However, the vulnerability does not impact integrity or availability directly according to the CVSS vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official 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-336c-5rgq-ch98
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-51630"]
Threat ID: 6a92f7f9acd9273b49e89ab2
Added to database: 08/29/2026, 15:17:13 UTC
Last enriched: 09/09/2026, 19:38:05 UTC
Last updated: 10/13/2026, 06:48:17 UTC
Views: 20
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