What’s Vulnerable › Vulnerabilities

CVE-2026-75123: PLANET GS-4210-16P2S V3 Command Injection via dispatcher.cgi web_smtp_test_post

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-09-08
• Weakness: CWE-78

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.

Affected products

• PLANET Technology Corp. PLANET GS-4210-16P2S V3: before 3.441b260626 — fixed in 3.441b260626

How to fix

Upgrade to a fixed version: PLANET Technology Corp. PLANET GS-4210-16P2S V3 3.441b260626. Check the vendor advisory for mitigations.

References

• https://www.planet.com.tw/en/support/security-advisory/10
• https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-command-injection-via-dispatcher-cgi-web-smtp-test-post

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