CVE-2026-4253

Tenda AC8 Web UploadCfg route_set_user_policy_rule os command injection

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

Tenda · AC8

CVSS v4.0 VULDB

2.0 LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 VULDB

4.7 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

CVSS v2.0 VULDB

5.8 MEDIUMAV:N/AC:L/Au:M/C:P/I:P/A:P

EPSS

8.56% chance of exploitation in the next 30 days, 95th percentile

Published

2026-03-16

Proof-of-concept exploits (1)

• digitalandrew/tenda_ac8_v5/blob/main/poc_cmdi_config_upload.py2★ · 2026-04-19

Security advisories

• https://vuldb.com/?id.351211
• https://vuldb.com/?submit.771771
• https://www.tenda.com.cn

References

• CVE Record
• NVD entry

Related

• CVE-2026-4252
• CVE-2026-4254