Acronis Backup Incorrect Default Permissions Vulnerability
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
Read at CISA Known Exploited Vulnerabilities catalog
- Vendor
- Acronis
- Product
- Backup
- CISA KEV
- added 16 Sep 2026, due 19 Sep 2026 (43d overdue)
- Exploitation
- observed in the wild
- Fix
- available
- Weakness
- CWE-276
- Exposure class
- Backup, Web platform
Why it ranks 69 (Critical)
- CISA KEV listed, remediation due 2026-09-19
- Exposed product class: backup
- Covered by 3 independent sources
- Fix available
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- CISA Known Exploited Vulnerabilities catalog (nvd.nist.gov)
- Vendor advisory (security-advisory.acronis.com)
- CVE-2026-87886 on this site · NVD · CVE.org · Vulnpedia · KEV
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