Critical severity · published Apr 8, 2026
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
9.8
CVSS
0.4%
EPSS
No
On KEV
Description
Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1, and funcpara2 parameters.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
Ac6 Firmware · Tenda
15.03.05.16_multi · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-52221
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-52221
Exploit
https://github.com/faqiadegege/IoTVuln/blob/main/tendaAc6_formSetCfm_funcname_overflow/detail.md
Third Party Advisory
https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md
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