What is CVE-2026-75121?

CVE-2026-75121 is a high-severity vulnerability, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-08-28.

How severe is CVE-2026-75121?

High severity. CVSS v3 base score is 7.2 out of 10.

CVE-2026-75121

CVE-2026-75121

PLANET GS-4210-16P2S 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.

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

disclosure@vulncheck.com (vendor-advisory, patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-75121?: CVE-2026-75121 is a high-severity vulnerability, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-08-28.
How severe is CVE-2026-75121?: High severity. CVSS v3 base score is 7.2 out of 10.