CVE-2026-87886: Acronis Backup Incorrect Default Permissions Vulnerability

Published Sep 16, 2026
·
Updated

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

Affected Software

1 affected component
Acronis Backup

Event History

Sep 16, 2026
CVE Published
via CISA·12:00 AM
Known Exploited
via CISA·12:00 AM
Data Sourced
via CISA·12:00 AM
RemedyDescriptionAffected Software

Frequently Asked Questions

1

Which deployments should be prioritized for review?

Deployments using the Acronis Backup plugin for cPanel & WHM or the Acronis Backup extension for Plesk should be prioritized.

2

Is exploitation known to be occurring?

Yes. The vulnerability is flagged as exploited and was listed in the KEV catalog on 2026-09-16.

3

Are default permission settings relevant to exposure?

Yes. The issue is described as incorrect default permissions, indicating that the default permission configuration is central to the privilege-escalation risk.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203