CVE-2026-21658 PUBLISHED

Johnson Controls -Frick Quantum HD- Unauthenticated Remote Code Execution

Assigner: jci
Reserved: 02.01.2026 Published: 27.02.2026 Updated: 27.02.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Johnson Controls
Product	Frick Controls Quantum HD
Versions	Default: unaffected Version Frick Controls Quantum HD version 10.22 and prior is affected

Solutions

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

Credits

Noam Moshe of Claroty Team 82 Research group finder

References

Problem Types

CWE-94 Improper Control of Generation of Code ('Code Injection') CWE

Impacts

CAPEC-242 Code Injection