EUVD-2026-68544
GHSA-743p-6f2w-2c98
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Unauthenticated network POST to cstecgi.cgi with no user interaction (AV:N/AC:L/PR:N/UI:N); exposes admin config and allows setting changes (C:H/I:H) with no direct availability loss (A:N).
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the setRemoteCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to expose WAN-side administration via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Exposure of WAN-side administration in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets unauthenticated remote attackers reconfigure the device by sending a crafted POST request to the setRemoteCfg handler in /cgi-bin/cstecgi.cgi. Because the endpoint fails to enforce authentication (CWE-284), an attacker can enable remote administration and alter security-relevant settings without any credentials. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the router's management web server and the ability to POST to /cgi-bin/cstecgi.cgi targeting the setRemoteCfg handler; per CVSS PR:N/UI:N no authentication or user interaction is needed. … 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, C:H/I:H/A:N, 9.1) describes a network-reachable, low-complexity, unauthenticated attack with high confidentiality and integrity impact and no availability impact - consistent with a router that gets its remote-management surface silently enabled/altered. … 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 references point to the TOTOLINK T6 firmware download page (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) and vendor-coordination READMEs rather than a specific fixed build, so administrators should monitor that page for a firmware release superseding 4.1.5cu.748_B20211015 and apply it once published. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all TOTOLINK T6 routers in production and document their network locations and roles; immediately disable WAN-side administrative access and remote administration features if operationally feasible. …
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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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