CVE-2025-52221
The Tenda AC6 router running firmware version 15.03.05.16_multi contains a buffer overflow vulnerability in the formSetCfm function that can be triggered via the funcname, funcpara1, and funcpara2 parameters. This flaw allows remote attackers to execute arbitrary code or cause a denial of service, resulting in a critical CVSS score of 9.8. As of the provided sources, no official patch or fix has been released.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
Users of Tenda AC6 firmware version 15.03.05.16_multi (and the generic Tenda AC6 1.0 product).
Real-world impact
An attacker could exploit this remotely to gain control of the device or disrupt its operation.
Why this severity
CVSS v3.1 base score of 9.8 (Critical) due to network‑adjacent attack vector, low attack complexity, no privileges or user interaction required, and high impact to confidentiality, integrity, and availability.
What to do about it
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- Apr 8, 2026 · Apr 8, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 25, 2026 · 11d agoAdvisory updatedThe NVD record was last revised.
How it’s attacked
References & advisories
- github.com/faqiadegege/IoTVuln/blob/ma…exploitthird party advisory
- github.com/xiaotea/iot-vulnerability-c…third party advisory