CVE-2026-92761: Retspen Webvirtcloud

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

WebVirtCloud fails to properly validate permission flags in UserInstance grants, allowing view-only users to perform privileged actions. Attackers with read-only grants can power off virtual machines, reset root passwords, install SSH keys, and manage ISO images by exploiting the get_instance gate that only checks grant existence.

Affected products

• Retspen Webvirtcloud

Published 2026-09-16. Last modified 2026-09-23.