CVE-2026-6199 Tenda CVE debrief

Who should care

Defenders responsible for Tenda F456 devices, security teams, and vulnerability management teams should assess exposure and potential for remote attacks. They should prioritize verifying exposure of Tenda F456 devices to this vulnerability and evaluate potential impacts. This includes reviewing compensating controls, monitoring for public exploit usage, and tracking exceptions.

Why it matters

Defenders should prioritize verifying exposure of Tenda F456 devices to this vulnerability and assess the potential for remote attacks.

• Verify exposure of Tenda F456 devices to this vulnerability
• Assess the potential for remote attacks
• Monitor for public exploit usage

Technical summary

The vulnerability is located in the fromqossetting function of the /goform/qossetting file in Tenda F456 devices. An attacker can exploit this vulnerability remotely to execute a stack-based buffer overflow attack. The vulnerability has a CVSS score of 7.4 and is considered HIGH severity. Defenders should prioritize verifying exposure of Tenda F456 devices to this vulnerability and assess the potential for remote attacks. The CVE record and NVD entry provide details on the vulnerability, including its description and CVSS score.

Defensive priority

Defenders should prioritize verifying exposure of Tenda F456 devices to this vulnerability and assess the potential for remote attacks.

Recommended defensive actions

• Verify exposure of Tenda F456 devices to this vulnerability
• Assess the potential for remote attacks
• Monitor for public exploit usage
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description and CVSS score of 7.4. The vulnerability allows for remote exploitation. Evidence is limited; defenders should verify exposure and assess potential impacts with available information. The CVE record was published on 2026-04-13T19:16:58.033Z and has not been modified since then.

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.