EUVD-2026-67879
GHSA-g395-xxcj-fpvx
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Adjacent vector reflects LAN-only management interface; PR:N confirmed by unauthenticated access; C:L as only MAC filter policy is disclosed; I:N and A:N as read-only impact.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the getMacFilterRules function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain MAC filter rules via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated MAC filter rule disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 permits any LAN-adjacent device to retrieve the router's MAC address filtering policy via a crafted POST to /cgi-bin/cstecgi.cgi without credentials. The getMacFilterRules CGI handler fails to enforce access control (CWE-284), exposing firewall policy data that could assist a local attacker in MAC address spoofing to bypass network access restrictions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker must have adjacent network (LAN) access to the TOTOLINK T6 router - internet-based exploitation is not possible given the AV:A vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 4.3 (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) accurately characterizes the limited threat: the adjacent attack vector confines exploitation to LAN-connected devices, ruling out internet-scale attack. … 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 at https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html for a firmware release that addresses this CVE; no specific patched firmware version number is confirmed in the available references, so verify with the vendor directly. … 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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