CVE-2026-87886 Acronis Backup - Privilege Escalation

Acronis Backup plugins for cPanel & WHM, Plesk, and DirectAdmin on Linux before specified builds contain a local privilege escalation caused by insecure file permissions, letting local attackers escalate privileges, exploit requires local access.

CVSS base score 7.8 /10
High
CISA KEV
Exploited in the wild
Public exploit
None known
Authentication
Required
EPSS
0.23% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026
Weakness
CWE-276

Vendor fix

Update to build 1.9.3.1021 for cPanel & WHM, 1.8.11.638 for Plesk, and 1.2.3.238 for DirectAdmin or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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