EUVD-2026-67878
GHSA-93fc-q292-rff3
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Adjacent vector confirmed by LAN-only reachability; C:L reflects VPN config disclosure only, with no integrity or availability impact.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the getVpnPassCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain VPN pass-through and WAN ping filter settings via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Incorrect access control in the TOTOLINK T6 router firmware exposes VPN pass-through and WAN ping filter settings to unauthenticated adjacent-network attackers. Firmware version 4.1.5cu.748_B20211015 fails to enforce authentication on the getVpnPassCfg function reachable via a crafted POST to /cgi-bin/cstecgi.cgi, leaking network configuration data. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must be on the same Layer-2 network segment (LAN or Wi-Fi) as the TOTOLINK T6 router - the AV:A vector rules out remote internet-based exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.3 Medium rating is consistent with the adjacent-network vector (AV:A), which limits exploitation to attackers already present on the LAN or Wi-Fi segment - not reachable from the open internet. … 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 data; the vendor firmware download page at https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html should be checked for firmware updates newer than 4.1.5cu.748_B20211015. … 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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