CVE-2026-25857

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.

Score

CVSS 3.1 8.8 High

Status

Analyzed - disclosure@vulncheck.com

Published

2026-02-07

Last modified

2026-05-11

Weaknesses

CWE-78

Affected products

• G300-f Firmware (Tenda)
• Rx9 Pro Firmware (Tenda)

References

• https://blog.evan.lat/blog/cve-2026-25857/
• https://www.tendacn.com/material/show/736333682028613
• https://www.vulncheck.com/advisories/tenda-g300-f-command-injection-via-formsetwandiag