CVE-2026-21657

CRITICAL
2026-02-27 [email protected]
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 27, 2026 - 09:16 nvd
CRITICAL 9.8

Tags

Code Injection Frick Controls Quantum Hd Firmware

Description

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

Second code injection vulnerability in Johnson Controls Frick Controls Quantum HD. Separate attack vector from CVE-2026-21656, same critical impact on industrial refrigeration control.

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Remediation

Within 24 hours: Identify all Frick Controls Quantum HD deployments in your environment and assess network exposure. Immediately isolate affected systems from internet-facing networks and restrict access to trusted administrators only. …

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Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +49
POC: 0

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CVE-2026-21657 vulnerability details – vuln.today
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