EUVD-2026-68743
GHSA-9rcc-9879-8p63
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network POST with no interaction (AV:N/AC:L/PR:N/UI:N); action resets config and reboots (I:H/A:H) but discloses no data directly (C:N).
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
Incorrect access control in the LoadDefSettings function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to reset the device configuration and reboot the device via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated factory-reset and reboot in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers wipe device configuration and force a restart by sending a crafted POST request to the LoadDefSettings handler in /cgi-bin/cstecgi.cgi. No credentials are required, and the action both disrupts service (reboot) and destroys operator settings by restoring defaults, which can re-expose default credentials and undo hardening. …
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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 at /cgi-bin/cstecgi.cgi and the ability to send a crafted POST request invoking the LoadDefSettings function on firmware 4.1.5cu.748_B20211015; no authentication, credentials, or user interaction are needed (CVSS PR:N/UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The published CVSS of 9.8 (AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:H) is directionally right on attack vector - network-reachable, no authentication, no user interaction, low complexity - but overstates confidentiality: a config reset and reboot primarily destroy integrity of settings and cause an availability outage; there is no direct data-exfiltration primitive, so C:H is not well supported (assessed C:N). … 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; monitor TOTOLINK's support/download pages (https://www.totolink.net/ and the T6 download page) and the 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) for a fixed firmware release, then upgrade to it. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit your environment for all TOTOLINK T6 routers and document firmware versions and deployment 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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