EUVD-2026-67903
GHSA-xj3w-wj7g-8gf2
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Network-reachable unauthenticated access warrants AV:N/PR:N, but exposed data (public IP, DDNS status) is low-sensitivity, so C:L not C:H.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
Incorrect access control in the getDdnsStatus function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain DDNS runtime status and public IP information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated information disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes DDNS runtime status and the router's public IP address to any network-reachable attacker. The getDdnsStatus function in the CGI interface fails to enforce access control, allowing a crafted POST request to /cgi-bin/cstecgi.cgi to return sensitive network configuration without credentials. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No authentication is required and no special configuration must be enabled - the getDdnsStatus function is accessible to any host that can reach /cgi-bin/cstecgi.cgi via HTTP POST. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) places this in High severity, but the C:H metric warrants scrutiny: the exposed data - DDNS runtime status and public IP - is of limited confidentiality sensitivity since public IP is inherently externally visible and DDNS hostname is typically public by design. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patched firmware version is identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an immediate inventory of all TOTOLINK T6 routers running firmware version 4.1.5cu.748_B20211015 to determine organizational exposure. …
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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