EUVD-2026-68589
GHSA-3v3m-pj2m-g57g
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Network-reachable CGI endpoint, zero auth required per description; integrity-only impact as DHCP rules are modified but no data is disclosed or service denied.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the setStaticDhcpRules function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to add or change static DHCP rules via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated remote manipulation of static DHCP rules on TOTOLINK T6 routers running firmware 4.1.5cu.748_B20211015 is possible due to missing access controls in the setStaticDhcpRules handler at /cgi-bin/cstecgi.cgi. An attacker with network access to the router's management interface can send a crafted POST request to add or replace DHCP reservations without any authentication. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No authentication or special configuration is required - the CVSS vector PR:N/AC:L/AV:N confirms unauthenticated network exploitation against the default firmware configuration of the TOTOLINK T6. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.5 (High) correctly reflects the trivially exploitable network attack surface and high integrity impact, but the EPSS score of 0.16% (6th percentile) indicates very low observed exploitation probability in the wild. … 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 has been identified in the available data - the references point to TOTOLINK's download page and researcher coordination repositories rather than a published security advisory with a fix version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all TOTOLINK T6 routers in production and immediately restrict management interface access via firewall rules, disabling remote access and limiting local administrative access to trusted subnets only. …
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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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