CVE-2026-77100: Commvault Cloud

High severity, CVSS 8.7. EPSS: 0.3% chance of exploitation in the next 30 days.

MediaAgent contained a heap-based buffer overflow issue affecting service availability. Software customers upgrade to resolved maintenance release. Update Commvault installation of MediaAgents and HyperScale.

Affected products

• Commvault Commvault Cloud: from 11.46.0, up to and including 11.46.29; from 11.44.0, up to and including 11.44.24; from 11.40.0, up to and including 11.40.77; from 11.36.0, up to and including 11.36.126

Published 2026-10-13. Last modified 2026-10-14.