Pre-authentication code execution via unvalidated parameters
Published Feb 27, 2026 · Updated Feb 27, 2026
Code injection in Johnson Controls FRICK Quantum HD 10.22 and earlier allows remote attackers to execute code before authentication. Certain pre-authentication request parameters reach code-generation logic without sufficient input validation; the vendor has not disclosed the parameter names or handler. Network reachability is the published gate, and successful exploitation can alter data or interrupt controller operation.
Summary
What happened
Code injection in Johnson Controls FRICK Quantum HD 10.22 and earlier allows remote attackers to execute code before authentication. Certain pre-authentication request parameters reach code-generation logic without sufficient input validation; the vendor has not disclosed the parameter names or handler. Network reachability is the published gate, and successful exploitation can alter data or interrupt controller operation.
The record
- CVE
- CVE-2026-21658
- Published
- Feb 27, 2026
- Updated
- Feb 27, 2026
- Vendor
- Johnson Controls
- Product
- FRICK Quantum HD
- Classifications
- CWE-94, CAPEC-242, T0866
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 27, 2026CVE publishedPublication date reported by the CVE source.
- Feb 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Frick Controls Quantum HD version 10.22 and prior
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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