EUVD-2026-67888
GHSA-9fvx-ghr7-4wc9
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Unauthenticated network read of one endpoint (AV:N/AC:L/PR:N); only Wi-Fi ACL rules are leaked so C:L, and no modification or DoS so I:N/A:N.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
Incorrect access control in the getWiFiAclRules function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain Wi-Fi ACL rules via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Information disclosure in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote unauthenticated attackers read the device's Wi-Fi ACL (MAC access-control) rules by sending a crafted POST request to the getWiFiAclRules handler in /cgi-bin/cstecgi.cgi. The CVSS vector marks it PR:N so no credentials are required, and no public exploit is identified at time of analysis; EPSS is low at 0.18% (7th percentile), indicating limited near-term exploitation likelihood.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires network reachability to the router's web management endpoint /cgi-bin/cstecgi.cgi and the ability to send a POST request invoking the getWiFiAclRules action; per CVSS PR:N/UI:N no authentication or user interaction is needed against firmware 4.1.5cu.748_B20211015. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The input CVSS of 9.1 (AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:N) overstates real impact: the vulnerability is a read-only information disclosure of Wi-Fi ACL rules, so the I:H integrity component is not supported by the description - this is a confidentiality issue, not a write/modify primitive, and the score should be treated as inflated. … 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 version is identified at time of analysis; the referenced TOTOLINK pages are the download/support portal (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) rather than a fixed-firmware advisory, so check there for firmware superseding 4.1.5cu.748_B20211015. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all TOTOLINK T6 routers (firmware 4.1.5cu.748_B20211015 and earlier) and implement firewall rules blocking external POST requests to /cgi-bin/cstecgi.cgi. …
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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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