Vulnerability details

CVE-2026-75121

PLANET Technology PLANET GS-4210-16P2S V3

PLANET GS-4210-16P2S V3 Command Injection via dispatcher.cgi web_vlan_membership_edit_dialog_post

CVSS 4.0

8.6High

Official description

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.

CVSS scores

Score	Version	Source	Vector
8.6High	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
7.2High	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
PLANET Technology Corp.	PLANET GS-4210-16P2S V3	v < 3.441b260626	CVEProject cvelistV5 (CNA)

References and advisories

https://www.planet.com.tw/en/support/security-advisory/10 vendor-advisorypatch
https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-command-injection-via-dispatcher-cgi-web-vlan-membership-edit-dialog-post third-party-advisory

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Details

Published: 2026-08-28
Last updated: 2026-09-01
State: Published
Assigner (CNA): VulnCheck

Exploit prediction (EPSS)

1.46%

Probability of exploitation in 30 days

73.7%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-78
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')