CVE-2026-75121
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.
- Published Aug 28, 2026
- CVSS 8.6 high
- 1.5% chance of exploitation in the next 30 days (EPSS)
- A fix is available