High severity · published Dec 30, 2025
CVE-2025-15356
Tenda AC20 PowerSaveSet sscanf buffer overflow
8.8
CVSS
4%
EPSS
No
On KEV
Description
A vulnerability has been found in Tenda AC20 up to 16.03.08.12. The impacted element is the function sscanf of the file /goform/PowerSaveSet. The manipulation of the argument powerSavingEn/time/powerSaveDelay/ledCloseType leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.0% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC20 · Tenda
16.03.08.0; 16.03.08.1; 16.03.08.2; 16.03.08.3; 16.03.08.4; 16.03.08.5; +7 more · source: vendor
AF
Ac20 Firmware · Tenda
through 16.03.08.12 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-15356
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-15356
Exploit
https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC20_Buffer_Overflow/Tenda%20AC20_Buffer_Overflow.md#poc
Exploit
https://github.com/xyh4ck/iot_poc/tree/main/Tenda%20AC20_Buffer_Overflow
Permissions Required
https://vuldb.com/?ctiid.338742
Third Party Advisory
https://vuldb.com/?id.338742
Third Party Advisory
https://vuldb.com/?submit.726360
Product
https://www.tenda.com.cn/
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