EUVD-2026-67911
GHSA-ff26-8823-6c2w
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
LAN/DHCP config is useful reconnaissance but not credential-class data, making C:L more accurate than the submitted C:H.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
Incorrect access control in the getLanCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain LAN addressing and DHCP configuration information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated LAN and DHCP configuration disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows remote attackers to retrieve internal network topology data by sending a crafted POST request to /cgi-bin/cstecgi.cgi without any credentials. The getLanCfg CGI handler applies no access control before returning LAN addressing and DHCP server configuration. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Network-level access to the TOTOLINK T6 management interface (TCP port 80 or 443) is required - typically available from any LAN-connected device, and from the internet if WAN-side remote management is enabled (non-default but common in misconfigured deployments). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) correctly captures the unauthenticated network-accessible nature and read-only impact, but C:H is likely overstated for this specific data class. … 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 has been identified at time of analysis; check https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html for firmware updates. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all TOTOLINK T6 devices running firmware version 4.1.5cu.748_B20211015 or earlier, verify their network exposure, and confirm whether any are accessible from untrusted networks or WAN. …
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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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