CVE-2026-6136 Tenda CVE debrief

Who should care

Defenders responsible for Tenda F451 devices, network administrators, and security teams should assess exposure and prioritize verification of device firmware versions and configurations.

Why it matters

CVE-2026-6136 is a stack-based buffer overflow vulnerability in Tenda F451 devices that can be exploited remotely. Defenders should prioritize verifying exposure, assessing network context, and implementing compensating controls.

• Verify exposure of Tenda F451 devices with firmware version 1.0.0.7_cn_svn7958
• Assess network context for potential remote attack vectors
• Implement compensating controls to limit exploitation attempts

Technical summary

The CVE-2026-6136 vulnerability is caused by a stack-based buffer overflow in the frmL7ImForm function of the /goform/L7Im file in Tenda F451 devices with firmware version 1.0.0.7_cn_svn7958. The vulnerability has a CVSS score of 7.4 and severity of HIGH. This vulnerability can be exploited remotely, and defenders should prioritize verifying exposure of Tenda F451 devices with firmware version 1.0.0.7_cn_svn7958 and assessing the network context for potential remote attack vectors. Implementing compensating controls can help limit exploitation attempts.

Defensive priority

Defenders should prioritize verifying exposure of Tenda F451 devices with firmware version 1.0.0.7_cn_svn7958 and assessing the network context for potential remote attack vectors.

Recommended defensive actions

• Verify Tenda F451 device firmware versions and configurations
• Assess network exposure and potential remote attack vectors
• Implement compensating controls to limit exploitation attempts
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• 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 entry provide details on the vulnerability, including its CVSS score of 7.4 and severity of HIGH. The vulnerability is caused by a stack-based buffer overflow in the frmL7ImForm function of the /goform/L7Im file, which can be exploited remotely.

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.