EUVD-2026-68752
GHSA-cg28-2gh4-vfcx
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated low-complexity network access to the CGI endpoint (AV:N/AC:L/PR:N/UI:N); mesh update-coordination abuse chiefly harms integrity/availability, with limited direct confidentiality (C:L).
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the informSlaveUpdate function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to trigger mesh slave update coordination via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated command coordination in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers invoke the informSlaveUpdate mesh-management function via a crafted POST request to /cgi-bin/cstecgi.cgi, without any credentials. Because the CGI endpoint fails to enforce access control (CWE-284), an attacker on a reachable network can trigger mesh slave update coordination, undermining the integrity and availability of the mesh fabric. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the TOTOLINK T6 device's HTTP management endpoint /cgi-bin/cstecgi.cgi and the ability to send a crafted POST that invokes the informSlaveUpdate function; per CVSS PR:N no authentication is needed and per UI:N no user interaction is required, matching the unauthenticated bypass described. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals here are notably discordant. … 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 in the provided data, so no fixed firmware build can be cited; monitor the TOTOLINK T6 firmware download page (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) and the coordination trackers (https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md) for updated firmware and apply it once released. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory and isolate all affected TOTOLINK T6 routers from external-facing networks; immediately apply firewall rules blocking all external access to /cgi-bin/cstecgi.cgi endpoint. …
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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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