EUVD-2026-67882
GHSA-mmhv-cr7f-f298
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Adjacent-network vector confirmed by router LAN context; PR:N per unauthenticated endpoint; only UPnP config disclosed so C:L with no integrity or availability impact.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the getUPnPCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain UPnP enablement and parsed port-mapping 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 UPnP enablement status and parsed port-mapping rules to adjacent-network attackers. The getUPnPCfg CGI handler on /cgi-bin/cstecgi.cgi accepts POST requests without enforcing authentication, violating the access-control model for device configuration endpoints. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must be on the same adjacent network segment as the TOTOLINK T6 (AV:A) - this is not remotely exploitable over the internet under standard router deployment. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS vector (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, score 4.3) correctly scopes this as an adjacent-network-only flaw with low confidentiality impact, meaning internet-based mass exploitation is not possible. … 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 specific patched firmware version is confirmed in the available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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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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