CVE-2026-21656: Johnson Controls -Frick Quantum HD- Unauthenticated Remote Code Execution

Published Feb 27, 2026
·
Updated

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.

Affected Software

3 affected components
Johnson Controls Frick Controls Quantum HD<10.22
All of the following
Johnsoncontrols Frick Controls Quantum Hd Firmware<=10.22
Johnsoncontrols Frick Controls Quantum Hd

Remediation

Information

a. Quantum HD version 10.22 through Version 11 is a previous product platform and is End Of support platform and should be upgraded to new platform with Quantum HD Unity version 12 and above. The update procedure can be found here:  https://frickcontrolsblob.file.core.windows.net/frickweb1/Quantum-HD-Unity/Quantum_HD_Unity_Software... https://frickcontrolsblob.file.core.windows.net/frickweb1/Quantum-HD-Unity/Quantum_HD_Unity_Software_Update_Procedure.pdf b. After the upgrade to version 12 is completed, ensure full alignment with hardening guide and apply all relevant security configurations. d. For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2026-05 at the following location

Event History

Feb 27, 2026
CVE Published
via MITRE·08:47 AM
Data Sourced
via MITRE·08:47 AM
RemedyDescriptionWeakness
Data Sourced
via NVD·09:16 AM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-21656?

CVE-2026-21656 has been classified as a high severity vulnerability due to its potential for unauthenticated remote code execution.

2

How do I fix CVE-2026-21656?

To mitigate CVE-2026-21656, users should apply the latest patches provided by Johnson Controls for Frick Controls Quantum HD.

3

What are the risks associated with CVE-2026-21656?

The risks associated with CVE-2026-21656 include unauthorized remote access and control over devices that could lead to further exploitation or disruption.

4

What products are affected by CVE-2026-21656?

CVE-2026-21656 affects Johnson Controls Frick Controls Quantum HD versions up to 10.22.

5

Is authentication required to exploit CVE-2026-21656?

No, CVE-2026-21656 can be exploited without authentication, making it particularly dangerous.

Company

Resources

Contact

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