Acronis fixes 1 actively exploited vulnerability

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[TLP:CLEAR] Acronis fixes 1 actively exploited vulnerability

Acronis fixes a high-severity vulnerability in its backup plugin for cPanel & WHM (1.9.3 HF3) and extension for Plesk (1.8.11) on Linux; active exploitation has been observed for the cPanel & WHM plugin [1].

Acronis Backup plugin for cPanel & WHM, Backup extension for Plesk - privilege escalation (CVE-2026-87886)

CVSS 7.8 (High)

An authenticated local attacker can escalate their privileges due to insecure file permissions [1].

The vulnerability is present in products:

Acronis Backup plugin for cPanel & WHM (Linux); <build 1.9.3.1021
Acronis Backup extension for Plesk (Linux); <build 1.8.11.638

CVSS: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

More information:

CVE-2026-87886 at cve.org, NVD
CWE-276: Incorrect Default Permissions at cwe.mitre.org

The vulnerability was publicly disclosed 15. 9. 2026.

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[TLP:CLEAR] Acronis fixes 1 actively exploited vulnerability

Acronis Backup plugin for cPanel & WHM, Backup extension for Plesk - privilege escalation (CVE-2026-87886)

CVSS 7.8 (High)

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