CVE-2026-5204 Tenda CVE debrief

Who should care

Users of Tenda CH22 1.0.0.1 should assess the vulnerability and apply mitigations. Operators of affected systems should review the vulnerability details and implement compensating controls to limit exposure. Vulnerability management and security teams should prioritize this vulnerability due to its high severity and remote attack possibility.

Technical summary

The vulnerability is in the formWebTypeLibrary function of the /goform/webtypelibrary file in Tenda CH22 1.0.0.1. The manipulation of the webSiteId argument can cause a stack-based buffer overflow, allowing for remote attacks. This vulnerability has a high CVSS score of 7.4, indicating high severity. The attack can be initiated remotely, and the exploit has been publicly disclosed. Users of Tenda CH22 1.0.0.1 should verify their deployments and assess potential exposure. Operators of affected systems should review the vulnerability details and implement compensating controls to limit exposure. Vulnerability management and security teams should prioritize this vulnerability due to its high severity and remote attack possibility. It is recommended that users assess the vulnerability and apply mitigations.

Defensive priority

High priority due to remote attack possibility and high CVSS score.

Recommended defensive actions

• Inventory and assess Tenda CH22 1.0.0.1 devices for exposure
• Apply vendor patches or mitigations if available
• Monitor network traffic for suspicious activity
• Implement compensating controls to limit exposure
• Review 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 was published on 2026-03-31T16:16:35.973Z and was last modified on 2026-07-24T20:10:00.147Z. The NVD entry is currently Analyzed. The vulnerability affects Tenda CH22 1.0.0.1 and has a CVSS score of 7.4. The attack can be initiated remotely, and the exploit has been publicly disclosed. Users should verify their deployments and assess potential exposure.

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.