CVE-2026-5300: Coolercontrol Coolercontrold

Critical severity, CVSS 9.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Unauthenticated functionality in CoolerControl/coolercontrold <4.0.0 allows unauthenticated attackers to view and modify potentially sensitive data via HTTP requests

Affected products

• Coolercontrol Coolercontrold: before 4.0.0 (fixed in 4.0.0)

Published 2026-04-08. Last modified 2026-07-24.