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.

• CWE-78

• https://blog.evan.lat/blog/cve-2026-25857/Exploit, Third Party Advisory
• https://www.tendacn.com/material/show/736333682028613Product
• https://www.vulncheck.com/advisories/tenda-g300-f-command-injection-via-formsetwandiagThird Party Advisory, VDB Entry

Published

Feb 7, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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