CVE-2021-27660: Johnsoncontrols C-Cure 9000 Firmware

High severity, CVSS 8.8. EPSS: 2.1% chance of exploitation in the next 30 days.

An insecure client auto update feature in C-CURE 9000 can allow remote execution of lower privileged Windows programs.

Affected products

• Johnsoncontrols C-Cure 9000 Firmware: before 2.80 (fixed in 2.80)

Published 2021-07-01. Last modified 2026-06-17.