Acronis cPanel Backup Plugin Vulnerability Exploited in Targeted Attacks

Acronis has warned that a high-severity security flaw in its Backup plugin for cPanel and Web Host Manager (WHM) deployments has been exploited in the wild.

The vulnerability, tracked as CVE-2026-87886 (CVSS score: 7.8), is described as a case of local privilege escalation due to insecure file permissions. It affects the following versions -

Acronis Backup plugin for cPanel & WHM (Linux