EUVD-2026-67885
GHSA-3w2r-c4w7-whmh
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Unauthenticated network read of diagnostic/ping data gives C:H, but the handler only discloses data so I:N and A:N, unlike the input's I:H.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
Incorrect access control in the getDiagnosisCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain diagnostic configuration and ping log contents via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated information disclosure in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers read diagnostic configuration and stored ping-log contents by sending a crafted POST request to the getDiagnosisCfg handler at /cgi-bin/cstecgi.cgi. The endpoint performs no authentication check (CWE-284), so any network-reachable attacker can retrieve the data. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the TOTOLINK T6 web management service (cstecgi.cgi) on firmware 4.1.5cu.748_B20211015 and a single crafted POST request invoking the getDiagnosisCfg function - no authentication, credentials, or user interaction are needed (PR:N/UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N, score 9.1) reflects trivial unauthenticated network access, and SSVC concurs the flaw is automatable with total technical impact. … 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 patch is identified at time of analysis; the references point to TOTOLINK's site and vendor-coordination trackers (https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md and https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md) rather than a fixed firmware build, so check the TOTOLINK download page (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) for updated firmware superseding 4.1.5cu.748_B20211015 and apply it once released. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Within 24 hours, identify all TOTOLINK T6 routers in your infrastructure and evaluate their network exposure to untrusted sources. …
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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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