CVE-2026-75123

High

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.

SeverityHigh

CVSS7.2

Exploit probability—

ProductPLANET GS-4210-16P2S V3

PublishedAug 28, 2026

First seenAug 28, 2026

Weakness typeCWE-78OS command injection

How to fix

Update

PLANET Technology Corp. PLANET GS-4210-16P2S V33.441b260626 or later

Patches

planet.com.tw/en/support/security-advisory/10

Affected products

Product	Affected versions	Fixed in
PLANET Technology Corp. PLANET GS-4210-16P2S V3	v < 3.441b260626	3.441b260626

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