Live › vulnerability › CVE-2026-87886
Go to dashboardThe Acronis Backup plugin for cPanel and WHM and the Acronis Backup extension for Plesk ship with incorrect default file permissions that allow privilege escalation. A local user with low privileges can gain higher privileges on the server, and CISA lists it as actively exploited.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
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.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| acronis backup | vendor | < 1.2.3 | 1.2.3 |
| acronis backup | vendor | < 1.8.11 | 1.8.11 |
| acronis backup | vendor | < 1.9.3 | 1.9.3 |
| acronis backup | vendor | = 1.9.3 | – |
| Acronis Backup |
| vendor |
| – |
| – |
Check whether the Acronis Backup cPanel/WHM plugin or Plesk extension is installed on the server; the sources do not name a file or command to confirm the permissions.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Acronis Backup plugin for cPanel & WHM and extension for Plesk contains an incorrect default permissions vulnerability that could allow for privilege escalation.
CISA 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.
This page as .md · .json · in your agent: get_signal("CVE-2026-87886")
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