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HIGH

CVE-2026-75123

CVSS v3

7.2

HIGH

EPSS Score

1.1 %

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

PLANET GS-4210-16P2S 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.

Technical details

CVSS v3 Vector
3.1
Published
2026-08-28
Last Modified
2026-08-28

Frequently asked questions

What is CVE-2026-75123?

PLANET GS-4210-16P2S 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.

Is CVE-2026-75123 actively exploited?

Active exploitation of CVE-2026-75123 has not been confirmed. The EPSS score is 1.1%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-75123?

CVE-2026-75123 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string 3.1.

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