EUVD-2026-67890
GHSA-j9gq-qx93-v962
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Wi-Fi pre-shared keys constitute full authentication credentials, warranting C:H; AV:A retained as CGI interface is LAN-facing; no integrity or availability impact.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the getWiFiBasicCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain core wireless settings, including SSIDs and Wi-Fi keys, via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated wireless credential exposure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows any device on the adjacent network to retrieve SSIDs and Wi-Fi pre-shared keys by sending a crafted POST request to the router's /cgi-bin/cstecgi.cgi CGI endpoint invoking the getWiFiBasicCfg function. The handler performs no authentication check before returning sensitive wireless configuration data, meaning no credentials, tokens, or session state are required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have network adjacency to the TOTOLINK T6 LAN-facing interface - reachability to the router's HTTP management port (typically TCP/80 at 192.168.x.1). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The official CVSS 3.1 score of 4.3 (Medium) with C:L understates the real-world confidentiality impact: the data exposed includes Wi-Fi pre-shared keys, which are full authentication credentials granting network access - not merely low-sensitivity configuration metadata. … 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 | Check the TOTOLINK firmware download page (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) for a firmware update that resolves this access control deficiency; no specific patched firmware version number is confirmed in the available references. … 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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