CVE-2026-21658
CRITICALCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2Description
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.
Analysis
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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Remediation
Within 24 hours: Identify and inventory all Frick Controls Quantum HD systems in your environment and isolate them from untrusted networks if operationally feasible. Within 7 days: Implement network segmentation to restrict access to these systems and enable enhanced monitoring for suspicious activity. …
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External POC / Exploit Code
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