High severity · published Mar 16, 2026
CVE-2026-4253
Tenda AC8 Web UploadCfg route_set_user_policy_rule os command injection
7.2
CVSS
7.2%
EPSS
No
On KEV
Description
A security flaw has been discovered in Tenda AC8 16.03.50.11. This affects the function route_set_user_policy_rule of the file /cgi-bin/UploadCfg of the component Web Interface. The manipulation of the argument wans.policy.list1 results in os command injection. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)7.2% · higher than 94% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC8 · Tenda
16.03.50.11 · source: vendor
AF
Ac8 Firmware · Tenda
16.03.50.11 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4253
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4253
Exploit
https://github.com/digitalandrew/tenda_ac8_v5/blob/main/poc_cmdi_config_upload.py
Permissions Required
https://vuldb.com/?ctiid.351211
Third Party Advisory
https://vuldb.com/?id.351211
Exploit
https://vuldb.com/?submit.771771
Product
https://www.tenda.com.cn/
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