EUVD-2026-68673
GHSA-g2w6-f26f-58pr
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Unauthenticated network POST with no interaction (PR:N/UI:N/AC:L); hijacking the upstream enables traffic interception and redirection (C:H/I:H), with no direct availability loss (A:N).
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
Incorrect access control in the setWiFiRepeaterCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to repoint the device to an attacker-controlled upstream Wi-Fi via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Incorrect access control in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets unauthenticated remote attackers hijack the device's Wi-Fi repeater configuration via a crafted POST to /cgi-bin/cstecgi.cgi, repointing the router to an attacker-controlled upstream access point. No public exploit or CISA KEV listing is identified at time of analysis, and the EPSS probability is low (0.16%), but the flaw is network-reachable with no authentication.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the TOTOLINK T6's HTTP interface and the ability to send a POST request to the /cgi-bin/cstecgi.cgi endpoint invoking the setWiFiRepeaterCfg function on firmware 4.1.5cu.748_B20211015; per the CVSS vector (PR:N/UI:N) no authentication and no user interaction are 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, score 9.1 Critical) describes a genuinely low-barrier attack: network vector, low complexity, no privileges, no user interaction. … 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 patched firmware version is identified in the provided data at time of analysis; check the TOTOLINK download page (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) for a firmware update newer than 4.1.5cu.748_B20211015 and apply it. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit inventory for TOTOLINK T6 routers running firmware 4.1.5cu.748_B20211015 and assess their network exposure and business criticality. …
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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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