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Frick Controls Quantum Hd Firmware CVE-2026-21660

CRITICAL
Plaintext Storage of a Password (CWE-256)
2026-02-27 productsecurity@jci.com
9.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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 - 10:16 nvd
CRITICAL 9.8

DescriptionCVE.org

Hardcoded Email Credentials Saved as Plaintext in Firmware (CWE-256: Plaintext Storage of a Password) vulnerability in Frick Controls Quantum HD version 10.22 and prior lead to unauthorized access, exposure of sensitive information, and potential misuse or system compromise This issue affects Frick Controls Quantum HD version 10.22 and prior.

AnalysisAI

Hardcoded email credentials stored as plaintext in Johnson Controls Frick Controls firmware. Sixth critical vulnerability — exposed credentials could enable account access and lateral movement.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain firmware image from Frick Controls Quantum HD
Exploit
Extract hardcoded email credentials from plaintext storage
Execution
Authenticate using exposed credentials
Impact
Access system with obtained privileges

Vulnerability AssessmentAI

Exploitation Attacker must have access to firmware binary (via device physical extraction, firmware download, or network interception). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.8. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Attacker extracts firmware image, retrieves hardcoded email credentials, uses them to access the email service for phishing, data exfiltration, or as pivot for further attacks.
Remediation Contact Johnson Controls for firmware update with credential management fix. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all Frick Controls Quantum HD installations and document current firmware versions; restrict network access to affected systems to essential personnel only; begin credential rotation for all email accounts potentially affected. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-21660 vulnerability details – vuln.today

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