Critical severity · published Aug 17, 2025
CVE-2025-9090
Tenda AC20 Telnet Service telnet websFormDefine command injection
9.8
CVSS
16.7%
EPSS
No
On KEV
Description
A vulnerability was identified in Tenda AC20 16.03.08.12. Affected is the function websFormDefine of the file /goform/telnet of the component Telnet Service. The manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
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)16.7% · higher than 97% 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-2025-9090
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9090
Exploit
https://github.com/ZZ2266/.github.io/blob/main/AC20/telnet/readme.md
Exploit
https://github.com/ZZ2266/.github.io/blob/main/AC20/telnet/readme.md#poc-exploit-steps
Permissions Required
https://vuldb.com/?ctiid.320358
Third Party Advisory
https://vuldb.com/?id.320358
Third Party Advisory
https://vuldb.com/?submit.632232
Product
https://www.tenda.com.cn/
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