EUVD-2026-70313
GHSA-xjrp-q25x-8wpw
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible CGI endpoint requires only low-privileged credentials; buffer overflow enables full root compromise with scope change affecting downstream network systems.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
6DescriptionCVE.org
A vulnerability was found in TOTOLINK CP450 4.1.0. The impacted element is an unknown function of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument topicurl results in buffer overflow. Remote exploitation of the attack is possible.
AnalysisAI
Buffer overflow in TOTOLINK CP450 4.1.0's web CGI handler allows low-privileged remote attackers to corrupt memory and likely execute arbitrary code by supplying an oversized value to the topicurl argument in /cgi-bin/cstecgi.cgi. The CVSS 4.0 threat metric E:P confirms proof-of-concept exploit code exists, elevating this beyond a theoretical concern. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | A valid low-privileged account on the TOTOLINK CP450 management interface is required (PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.6 with AV:N/AC:L/AT:N/PR:L/UI:N reflects a low-complexity network attack requiring only low-privileged authentication - in practice, a valid management interface login. … 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. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a full device inventory to identify all TOTOLINK CP450 systems running version 4.1.0 and prioritize those handling critical network functions. …
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Least-privilege violation across multiple TOTOLINK SOHO router models (A3000RU, A3100R, A950RG, AC1200T10, CP450, CS185R
Least privilege violation in TOTOLINK CP450 router firmware 4.1.0cu.747 allows low-privileged remote attackers to perfor
Same weakness CWE-120 – Classic Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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