EUVD-2026-68651
GHSA-2pmg-2pg7-55cv
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated low-complexity network write to DMZ config gives I:H; exposing a separate internal host is a scope change with indirect C:L; no direct availability impact, so A:N.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
Incorrect access control in the setDmzCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to expose an internal host via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthorized DMZ reconfiguration in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets a remote, unauthenticated attacker reach the setDmzCfg handler exposed by /cgi-bin/cstecgi.cgi and place an internal LAN host into the router's DMZ, making that host directly reachable from the internet. The flaw stems from a missing authentication/authorization check (CWE-284) on a state-changing configuration function. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires the router's HTTP interface exposing /cgi-bin/cstecgi.cgi to be network-reachable by the attacker and the setDmzCfg action to be callable - per CVSS PR:N no authentication is needed and per UI:N no user interaction is required, so exploitation works against default configurations of the TOTOLINK T6 on firmware 4.1.5cu.748_B20211015. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals conflict and should be weighed rather than taken at face value. … 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 patched firmware version is independently confirmed from the provided data; the TOTOLINK download portal (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) is referenced, so check it for a firmware build later than 4.1.5cu.748_B20211015 and apply it if available. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all TOTOLINK T6 routers in production and firmware versions deployed; assess which internal systems could be placed into DMZ and their criticality. …
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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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