CVE-2026-75121: Planet Technology Corp Planet Gs-4210-16p2s v3

High severity, CVSS 7.2. EPSS: 1.5% chance of exploitation in the next 30 days.

PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains an authenticated OS command injection vulnerability in /cgi-bin/dispatcher.cgi. The web_vlan_membership_edit_dialog_post handler incorporates the memberTags POST parameter into a shell command without sanitization. A remote authenticated attacker can send a crafted memberTags value to execute arbitrary operating-system commands on the device.

Affected products

• Planet Technology Corp Planet Gs-4210-16p2s v3: before 3.441b260626 (fixed in 3.441b260626)

Published 2026-08-28. Last modified 2026-09-08.