CVE Catalog

Actively exploited in the wild

Acronis Backup Incorrect Default Permissions Vulnerability

Acronis - Backup · Listed in the CISA KEV since 2026-09-16. This indicates confirmed attacks in production environments.

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CVE-2026-87886

HighCVSS 7.8KEV
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.25%

17th percentile - higher than 17% of all known CVEs

Summary

The vulnerability is a local privilege escalation due to insecure file permissions. It affects Acronis Backup plugin for cPanel & WHM (Linux) before build 1.9.3.1021, Acronis Backup extension for Plesk (Linux) before build 1.8.11.638, and Acronis Backup plugin for DirectAdmin (Linux) before build 1.2.3.238.

Risk Assessment

A local attacker can exploit insecure file permissions to escalate privileges on the system, potentially leading to system compromise by a low-privileged user.

Recommendation

Update the listed Acronis plugins to at least version 1.9.3.1021 (cPanel & WHM), 1.8.11.638 (Plesk), and 1.2.3.238 (DirectAdmin).

Related vulnerabilities

Original NVD description (English source)

Local privilege escalation due to insecure file permissions. The following products are affected: Acronis Backup plugin for cPanel & WHM (Linux) before build 1.9.3.1021, Acronis Backup extension for Plesk (Linux) before build 1.8.11.638, Acronis Backup plugin for DirectAdmin (Linux) before build 1.2.3.238.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS