Critical severity · published Jan 6, 2026
CVE-2026-0640
Tenda AC23 PowerSaveSet sscanf buffer overflow
9.8
CVSS
3.5%
EPSS
No
On KEV
Description
A weakness has been identified in Tenda AC23 16.03.07.52. This affects the function sscanf of the file /goform/PowerSaveSet. Executing a manipulation of the argument Time can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.
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)3.5% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC23 · Tenda
16.03.07.52 · source: vendor
AF
Ac23 Firmware · Tenda
16.03.07.52 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0640
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0640
Exploit
https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow/Tenda%20AC23_Buffer_Overflow.md
Exploit
https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow/Tenda%20AC23_Buffer_Overflow.md#poc
Permissions Required
https://vuldb.com/?ctiid.339683
Third Party Advisory
https://vuldb.com/?id.339683
Third Party Advisory
https://vuldb.com/?submit.731772
Product
https://www.tenda.com.cn/
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