Question 1

What is CVE-2026-87886 — Acronis Backup Incorrect Default Permissions Vulnerability?

Accepted Answer

Acronis Backup plugin for cPanel & WHM and extension for Plesk contains an incorrect default permissions vulnerability that could allow for privilege escalation.

Question 2

What is the authoritative source for CVE-2026-87886?

Accepted Answer

Acronis Backup Incorrect Default Permissions Vulnerability (CVE-2026-87886) is catalogued in NVD + CISA KEV + FIRST EPSS and curated for EU compliance use cases by SQUR.

CVSS	7.8 ()
Vector	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS	0.23% probability of exploitation · percentile 12.9% · 2026-10-05T12:00:23Z
Last modified	2026-09-18

CVE-2026-87886Acronis Backup Incorrect Default Permissions Vulnerability

Description

Scoring

CISA KEV entry