RCE in Planet Technology Corp. Gs-4210-16p2s V3
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.015 (72.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.015 · change: +0.003
Affected products
Weakness classification (CWE)
References
- www.planet.com.tw/en/support/security-advisory/10 (vendor-advisory, patch)
- www.vulncheck.com/advisories/planet-gs-4210-16p2s-command-injection-via-dispatc… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75121?
- CVE-2026-75121 is a high-severity vulnerability in Planet Technology Corp. Gs-4210-16p2s V3, 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.