CVE-2026-5687 Tenda CVE debrief

Who should care

Network administrators and security teams responsible for Tenda CX12L devices should prioritize patching this vulnerability to prevent potential remote attacks. This includes reviewing network configurations, ensuring up-to-date firmware, and monitoring for suspicious activity.

Technical summary

The vulnerability is caused by a stack-based buffer overflow in the fromNatStaticSetting function of the /goform/NatStaticSetting file in Tenda CX12L 16.03.53.12. The attack vector is network-based, and the attack complexity is low. The vulnerability has a CVSS score of 7.4 and a severity of HIGH. Network administrators and security teams responsible for Tenda CX12L devices should prioritize patching this vulnerability to prevent potential remote attacks.

Defensive priority

High priority should be given to patching this vulnerability, as it can be exploited remotely and has a high CVSS score.

Recommended defensive actions

• Apply the vendor-provided patch or update to a fixed version of the firmware.
• Implement network segmentation to limit the attack surface.
• Monitor network traffic and system logs for suspicious activity.
• Consider implementing compensating controls, such as Web Application Firewalls (WAFs).
• Conduct regular vulnerability assessments and penetration testing to identify potential vulnerabilities.
• Review and update incident response plans to include procedures for responding to potential exploitation of this vulnerability.
• Verify that all Tenda CX12L devices are properly configured and secured according to vendor guidelines.

Evidence notes

The CVE record was published on 2026-04-06T22:16:25.070Z and was last modified on 2026-07-24T09:10:00.153Z. The NVD entry is currently Analyzed. The vulnerability affects Tenda CX12L 16.03.53.12, specifically the fromNatStaticSetting function of the /goform/NatStaticSetting file. The attack vector is network-based, and the attack complexity is low. The CVSS score is 7.4, and the severity is HIGH. Evidence limits suggest remote exploitation is possible but detailed exploit steps are not verified.

Official resources