Vulnerability · Published Mar 16, 2026 · Assigned by VulDB

CVE-2026-4253Tenda AC8 Web UploadCfg route_set_user_policy_rule os command injection

Medium 4.7

In plain English

A medium-severity OS command injection in AC8 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 7.4% (higher than 94% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)4.7Medium

Exploit odds (30 days)7.4%top 5.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Tenda	AC8	16.03.50.11

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-351211 | Tenda AC8 Web UploadCfg route_set_user_policy_rule os command injection vdb-entry, technical-description
VDB-351211 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #771771 | Tenda AC8 V5 V16.03.50.11 OS Command Injection third-party-advisory
https://github.com/digitalandrew/tenda_ac8_v5/blob/main/poc_cmdi_config_upload.py exploit
https://www.tenda.com.cn/ product