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Frick Controls Quantum Hd Firmware CVE-2026-21658

CRITICAL
Code Injection (CWE-94)
2026-02-27 productsecurity@jci.com
9.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

DescriptionCVE.org

Unauthenticated Remote Code Execution i.e Improper Control of Generation of Code ('Code Injection') vulnerability in Johnson Controls Frick Controls Quantum HD allows Code 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.

AnalysisAI

Unauthenticated remote code execution via code injection in Johnson Controls Frick Controls Quantum HD. Fourth critical vulnerability — this one explicitly noted as unauthenticated RCE.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send crafted HTTP request to unauthenticated endpoint
Exploit
Inject malicious code into unvalidated parameter
Execution
Execute arbitrary code on Quantum HD device
Impact
Gain full system compromise

Vulnerability AssessmentAI

Exploitation Johnson Controls Frick Controls Quantum HD version 10.22 or prior with network accessibility. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.8, EPSS 0.25%. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Attacker exploits unauthenticated code injection to gain complete control of Quantum HD controller, manipulates refrigeration parameters for physical impact or uses as OT network pivot.
Remediation Highest priority ICS patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify and inventory all Frick Controls Quantum HD systems in your environment and isolate them from untrusted networks if operationally feasible. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-21658 vulnerability details – vuln.today

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