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Acronis cPanel Backup Plugin Privilege Escalation Exploited in Wild
- Engineer — Act: The plugin is confirmed exploited in targeted attacks despite no KEV listing; if you run cPanel/WHM with the Acronis Backup plugin on Linux, update to the patched version immediately and audit file permissions on affected hosts.
- SOC/IR — Plan: No IOCs are published yet, but active targeted exploitation warrants building a detection for abnormal privilege escalation events originating from Acronis backup processes on cPanel/WHM Linux hosts; queue a hunt for unusual UID-0 transitions tied to Acronis service accounts.
- Leader — Skip
- Signals: CVE-2026-87886 — CISA KEV: not listed, EPSS n/a, no public PoC found
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