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CVE-2026-21657

Johnson Controls -Frick Quantum HD- Unauthenticated Remote Code Execution

High8.8EPSS 0.45%
Published
Updated
Reserved
Assigned by
jci

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.

Scores

CVSS scores of CVE-2026-21657, by who scored it
Scored byCVSSScoreVector
jciCNA (assigner)4.0High8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
NVDNVD · Analyzed4.0High8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
0.45% · top 61% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.

Weakness

Affected products

What to do

Solution: a. Quantum HD version 10.22 through Version 11 is a previous product platform and is End Of support platform and should be upgraded to new platform with Quantum HD Unity version 12 and above.  The update procedure can be found here:  https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .