CVE-2026-25857 HIGH

CVE-2026-25857: Tenda G300-F Command Injection via formSetWanDiag

Vendor Shenzhen Tenda Technology
Product Tenda G300-F
Weakness CWE-78
Published February 7, 2026
Last update May 11, 2026

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Tenda G300-F router firmware version 16.01.14.2 and prior contain an OS command injection vulnerability in the WAN diagnostic functionality (formSetWanDiag). The implementation constructs a shell command that invokes curl and incorporates attacker-controlled input into the command line without adequate neutralization. As a result, a remote attacker with access to the affected management interface can inject additional shell syntax and execute arbitrary commands on the device with the privileges of the management process.

Key dates

02Disclosure timeline

February 7, 2026 CVE published
May 11, 2026 Record updated