CVE-2026-21654

CRITICAL
2026-02-27 [email protected]
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 27, 2026 - 09:16 nvd
CRITICAL 9.8

Tags

Command Injection Frick Controls Quantum Hd Firmware

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.

Analysis

OS command injection in Johnson Controls Frick Controls Quantum HD allows unauthenticated remote attackers to execute arbitrary commands on industrial refrigeration control systems. CVSS 9.8.

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Remediation

Within 24 hours: Identify and inventory all Frick Controls Quantum HD systems in your environment and assess their network exposure. Within 7 days: Implement network segmentation to restrict access to affected systems to authorized personnel only, disable remote management features if operationally feasible, and establish 24/7 monitoring for suspicious command execution. …

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Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: +0.2
CVSS: +49
POC: 0

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CVE-2026-21654 vulnerability details – vuln.today
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