Critical severity · published Feb 27, 2026
CVE-2026-21659
Johnson Controls -Frick Quantum HD-Unauthenticated Remote Code Execution and Information Disclosure due to Local File Inclusion
9.8
CVSS
1%
EPSS
No
On KEV
Description
Unauthenticated Remote Code Execution and Information Disclosure due to Local File Inclusion (LFI) vulnerability in Johnson Controls Frick Controls Quantum HD allow an unauthenticated attacker to execute arbitrary code on the affected device, leading to full system compromise. This issue affects Frick Controls Quantum HD: Frick Controls Quantum HD version 10.22 and prior.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 64% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FC
Frick Controls Quantum HD · Johnson Controls
Frick Controls Quantum HD version 10.22 and prior · source: vendor
In the news
AdvisoryCritical
Johnson Controls, Inc. Frick Controls Quantum HD
View CSAF Summary Successful exploitation of these vulnerabilities can lead to pre-authentication remote code execution, information leak or denial of service. The following versions of Johnson Controls, Inc. Frick Controls Quantum HD are affected: Frick Controls Quantum HD <=10.22 (CVE-2026-21654, CVE-2026-21656, CVE-2026-21657, CVE-2026-21658, CVE-2026-21659, CVE-2026-21660) CVSS Vendor Equipment Vulnerabilities v3 9.1 Johnson Controls, Inc. Johnson Controls, Inc. Frick Controls Quantum HD Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), Improper Control of Generation of Code ('Code Injection'), Relative Path Traversal, Plaintext Storage of a Password Background Critical Infrastructure Sectors: Food and Agriculture Countries/Areas Deployed: Worldwide Company Headquarters Location: Ireland Vulnerabilities Expand All + CVE-2026-21654 The Frick Controls Quantum HD is vulnerable due to insufficient validation of input in certain parameters that may permit unexpected actions, which could impact the security of the device before authentication occurs. View CVE Details Affected Products Johnson Controls, Inc. Frick Controls Quantum HD Vendor: Johnson Controls, Inc. Product Version: Johnson Controls, Inc. Frick Controls Quantum HD: <=10.22 Product Status: known_affected Remediations Vendor fix The Frick Cont...
Feb 26, 2026·CISA Advisories
Affected product
FC
Frick Controls Quantum HD
Johnson Controls
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