CVE-2026-21659: high-severity vulnerability in Johnson Controls Frick Controls Quantum HD
Johnson Controls -Frick Quantum HD-Unauthenticated Remote Code Execution and Information Disclosure due to Local File Inclusion
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 1.0%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
Johnson Controls · Frick Controls Quantum HDRelated CVEs — Johnson Controls Frick Controls Quantum HD
In the same product, most dangerous first.
CVE-2026-21654HIGHJohnson Controls -Frick Quantum HD- Unauthenticated Remote Code ExecutionEPSS 1.7%CVE-2026-21658HIGHJohnson Controls -Frick Quantum HD- Unauthenticated Remote Code ExecutionEPSS 0.7%CVE-2026-21657HIGHJohnson Controls -Frick Quantum HD- Unauthenticated Remote Code ExecutionEPSS 0.4%CVE-2026-21656HIGHJohnson Controls -Frick Quantum HD- Unauthenticated Remote Code ExecutionEPSS 0.4%CVE-2026-21660MEDIUMJohnson Controls-Frick Quantum HD-Hardcoded Email Credentials Saved as Plaintext in FirmwareEPSS 0.3%