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CRITICAL

CVE-2026-21654

CVSS v3

9.8

CRITICAL

EPSS Score

1.5 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Johnson Controls Frick Controls Quantum HD allows OS Command Injection. Insufficient validation of input in certain parameters may permit unexpected actions, which could impact the security of the device before authentication occurs.This issue affects Frick Controls Quantum HD version 10.22 and prior.

Technical details

Published
2026-02-27
Last Modified
2026-03-02

Frequently asked questions

What is CVE-2026-21654?

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Johnson Controls Frick Controls Quantum HD allows OS Command Injection. Insufficient validation of input in certain parameters may permit unexpected actions, which could impact the security of the device before authentication occurs.This issue affects Frick Controls Quantum HD version 10.22 and prior.

Is CVE-2026-21654 actively exploited?

Active exploitation of CVE-2026-21654 has not been confirmed. Its EPSS score was 1.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-21654?

CVE-2026-21654 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2026-21654 affecting your environment?

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