EUVD-2026-68647
GHSA-38v2-7q6w-2g4m
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Adjacent-only vector (AV:A) because management interface is LAN-reachable; no authentication (PR:N) per description; integrity-only impact as firewall rules are modified but no data read or service disrupted.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the setIpPortFilterRules function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to alter firewall policies via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated firewall policy manipulation in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes the setIpPortFilterRules function to any attacker on the adjacent network segment. A crafted POST request to /cgi-bin/cstecgi.cgi bypasses all access control (CWE-284) and allows modification of the device's IP/port filtering rules without credentials. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must be present on the adjacent network segment reachable by the TOTOLINK T6's LAN or management interface - this is not remotely exploitable from the internet unless the management CGI is explicitly exposed externally, which is non-default for consumer routers. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:A/AC:L/PR:N/UI:N constrains exploitation to attackers already present on the same network segment as the router's LAN or management interface, which substantially limits real-world exposure compared to internet-facing vulnerabilities. … 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 with an exact fixed firmware version has been identified in the available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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