EUVD-2026-68676
GHSA-v6fp-cxm2-wrch
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Network-reachable unauthenticated endpoint with no complexity; impact is solely integrity loss via rule deletion, no confidentiality or availability effect.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the delUrlFilterRules function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to remove URL filtering rules via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Unauthenticated integrity compromise in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows remote attackers to delete URL filtering rules without any credentials. The CGI endpoint /cgi-bin/cstecgi.cgi exposes the delUrlFilterRules function with no access control enforcement, meaning any network-reachable actor can silently dismantle content filtering or parental-control policies by sending a crafted POST request. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The management web interface at /cgi-bin/cstecgi.cgi must be network-reachable from the attacker's position. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) accurately reflects that exploitation is trivial - no authentication, no complexity, no user interaction required. … 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 | Upgrade to a patched firmware version once TOTOLINK releases an advisory - no specific fixed version was identified in the available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all TOTOLINK T6 devices in your environment and verify firmware version 4.1.5cu.748_B20211015 or earlier; implement immediate firewall rules to restrict network access to the device's management interfaces. …
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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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