CVE-2026-21657: 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://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories

Event History

Feb 27, 2026
CVE Published
via MITRE·08:54 AM
Data Sourced
via MITRE·08:54 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-2026-21657?

The severity of CVE-2026-21657 is classified as critical due to the risk of unauthenticated remote code execution.

2

How do I fix CVE-2026-21657?

To fix CVE-2026-21657, update Johnson Controls Frick Controls Quantum HD to the latest version beyond 10.22 that addresses this vulnerability.

3

What type of vulnerability is CVE-2026-21657?

CVE-2026-21657 is an unauthenticated remote code execution vulnerability due to improper control of code generation.

4

Which versions of Johnson Controls Frick Controls Quantum HD are affected by CVE-2026-21657?

Versions of Johnson Controls Frick Controls Quantum HD up to and including 10.22 are affected by CVE-2026-21657.

5

What are the risks associated with CVE-2026-21657?

The risks associated with CVE-2026-21657 include unauthorized execution of arbitrary code, leading to potential system compromise or control.

Company

Resources

Contact

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