High severity · published Dec 14, 2025
CVE-2025-14656
Tenda AC20 openSchedWifi httpd buffer overflow
8.8
CVSS
0.7%
EPSS
No
On KEV
Description
A weakness has been identified in Tenda AC20 16.03.08.12. This affects the function httpd of the file /goform/openSchedWifi. Executing a manipulation of the argument schedStartTime/schedEndTime can lead to buffer overflow. The attack may be performed from remote. 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: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)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC20 · Tenda
16.03.08.12 · source: vendor
AF
Ac20 Firmware · Tenda
16.03.08.12 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-14656
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-14656
Exploit
https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN14/AC20_openSchedWifi.md
Permissions Required
https://vuldb.com/?ctiid.336389
Third Party Advisory
https://vuldb.com/?id.336389
Third Party Advisory
https://vuldb.com/?submit.712917
Product
https://www.tenda.com.cn/
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