CVE-2026-114382 TOTOLINK CVE debrief

Who should care

Network administrators and security teams responsible for managing TOTOLINK EX200 5.2.3c.7200 devices should assess exposure and apply patches or mitigations to prevent exploitation.

Why it matters

This critical vulnerability in TOTOLINK EX200 5.2.3c.7200 requires immediate attention from network administrators and security teams to assess exposure and apply patches or mitigations to prevent remote exploitation and potential arbitrary code execution.

• Remote exploitation of this vulnerability could lead to arbitrary code execution
• Successful exploitation could result in elevated privileges on the affected device
• The vulnerability's CVSS score of 9.3 indicates a high severity level
• Verification of the lan.so component's integrity is necessary to prevent exploitation

Technical summary

The TOTOLINK EX200 5.2.3c.7200 device is vulnerable to a stack-based buffer overflow in the setStaticDhcpConfig function of the /cgi-bin/cstecgi.cgi file in the lan.so component. The vulnerability is caused by manipulation of the Comment argument and can be exploited remotely. Affected product deployments require immediate review for exposure and application of patches or mitigations to prevent exploitation and potential arbitrary code execution. Network administrators and security teams should verify the integrity of the lan.so component and monitor network traffic for suspicious activity related to this vulnerability.

Defensive priority

High priority for network administrators and security teams to assess exposure and apply patches or mitigations.

Recommended defensive actions

• Assess exposure of TOTOLINK EX200 5.2.3c.7200 devices to this vulnerability
• Apply patches or mitigations to prevent exploitation
• Monitor network traffic for suspicious activity
• Verify the integrity of the lan.so component
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability, including its CVSS score of 9.3 and severity of CRITICAL. However, the vendor and product information is not available, and the exploit details are limited.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.