EUVD-2026-68645
GHSA-2mmr-4w9x-9cmj
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Adjacent-network vector confirmed; no auth required; impact is limited to low integrity modification of mesh config with no confidentiality or availability effect.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the setWiFiMeshConfig function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to alter mesh configurations via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated mesh configuration tampering in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows any attacker with adjacent network access to overwrite WiFi mesh settings by sending a crafted POST request directly to the /cgi-bin/cstecgi.cgi handler without supplying credentials. The setWiFiMeshConfig function applies no access control check before processing the request, a CWE-284 (Improper Access Control) condition consistent with a pattern of missing authentication enforcement observed across multiple CGI handlers in this firmware. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to occupy the same Layer 2 network segment or a directly routed subnet from which the TOTOLINK T6 management interface (port 80/443 on the LAN-side IP) is reachable - internet-based remote exploitation is not possible due to AV:A. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.3 Medium score with AV:A/PR:N accurately captures the real-world risk profile: exploitation is unauthenticated but requires the attacker to already be on the same network segment, which significantly limits exposure compared to internet-facing vulnerabilities. … 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 specific patched firmware version is identified in the available advisory data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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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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