Buffer overflow in Tenda Ac6

CVE-2025-52221

Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1, and funcpara2 parameters.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (31.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Tenda Ac6 — versions 1.0
Tenda Ac6_firmware — versions 15.03.05.16_multi
N/a — versions n/a

Weakness classification (CWE)

References

cve@mitre.org (Exploit, Third Party Advisory)
cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2025-52221?: CVE-2025-52221 is a critical-severity vulnerability in Tenda Ac6, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2026-04-08.
How severe is CVE-2025-52221?: Critical severity. CVSS v3 base score is 9.8 out of 10.