CVE-2026-75121: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in PLANET Technology Corp. PLANET GS-4210-16P2S V3
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 v4.0
Score 8.6high
Affected software
PLANET Technology Corp.
PLANET GS-4210-16P2S V3
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-75121 is an authenticated OS command injection vulnerability in PLANET Technology Corp.'s PLANET GS-4210-16P2S V3 device firmware prior to version 3.441b260626. The flaw exists in the /cgi-bin/dispatcher.cgi endpoint, specifically in the web_vlan_membership_edit_dialog_post handler, which incorporates the memberTags POST parameter into a shell command without sanitization. This allows a remote authenticated attacker to execute arbitrary OS commands on the device, potentially compromising device integrity and control.
Potential Impact
An authenticated attacker can execute arbitrary operating system commands on the affected device, potentially leading to full device compromise. This could allow unauthorized control over device functions, data exposure, or disruption of network operations relying on the device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated access to the device's management interface and monitor for suspicious activity related to the /cgi-bin/dispatcher.cgi endpoint.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-17T18:39:57.660Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a91e410acd9273b4942e877
Added to database: 08/28/2026, 19:40:00 UTC
Last enriched: 09/07/2026, 14:17:50 UTC
Last updated: 10/11/2026, 06:48:18 UTC
Views: 51
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