CVE-2026-75123: 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_smtp_test_post handler incorporates a caller-supplied SMTP server value directly into a shell command without sanitization. A remote attacker with administrator web credentials can send a crafted SMTP server 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
This vulnerability (CVE-2026-75123) affects PLANET GS-4210-16P2S V3 devices running firmware versions prior to 3.441b260626. The flaw is an OS command injection in the /cgi-bin/dispatcher.cgi interface, specifically in the web_smtp_test_post handler. It occurs because the SMTP server parameter is incorporated into a shell command without neutralizing special characters, allowing an authenticated attacker with admin web access to execute arbitrary operating system commands on the device.
Potential Impact
Successful exploitation allows an attacker with administrator web credentials to execute arbitrary OS commands on the affected device. This can lead to full compromise of the device, including unauthorized control and potential disruption of network operations.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, restrict administrator web access to trusted users only 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: 6a91e410acd9273b4942e87b
Added to database: 08/28/2026, 19:40:00 UTC
Last enriched: 09/07/2026, 14:18:00 UTC
Last updated: 10/12/2026, 06:48:19 UTC
Views: 77
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