CVE-2026-21660: Johnson Controls-Frick Quantum HD-Hardcoded Email Credentials Saved as Plaintext in Firmware

Published Feb 27, 2026
·
Updated

Hardcoded Email Credentials Saved as Plaintext in Firmware (CWE-256: Plaintext Storage of a Password) vulnerability in Frick Controls Quantum HD version 10.22 and prior lead to unauthorized access, exposure of sensitive information, and potential misuse or system compromise This issue affects Frick Controls Quantum HD version 10.22 and prior.

Affected Software

3 affected components
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·09:18 AM
Data Sourced
via MITRE·09:18 AM
RemedyDescriptionWeakness
Data Sourced
via NVD·10:16 AM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-21660?

CVE-2026-21660 is a high severity vulnerability due to hardcoded email credentials stored in plaintext, allowing unauthorized access.

2

How do I fix CVE-2026-21660?

To mitigate CVE-2026-21660, upgrade to Frick Controls Quantum HD version 10.23 or later to eliminate hardcoded credentials.

3

What are the potential impacts of CVE-2026-21660?

CVE-2026-21660 could lead to unauthorized access to system controls and vulnerabilities in data exposure.

4

Which versions of Frick Controls Quantum HD are affected by CVE-2026-21660?

Frick Controls Quantum HD versions 10.22 and earlier are affected by CVE-2026-21660.

5

Is there a workaround for CVE-2026-21660?

There is no official workaround for CVE-2026-21660; upgrading to a patched version is recommended.

Company

Resources

Contact

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