Risk Letters

Exploited vulnerability

CVE-2026-87886

TLP:CLEAR

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.

Facts

  • Vendor: Acronis
  • Product: Backup
  • CVSS: 7.8
  • EPSS (probability of exploitation within 30 days): 0.2 %
  • On CISA's Known Exploited Vulnerabilities list since: 16 September 2026
  • First known exploitation: 16 September 2026
  • CISA's deadline for US federal agencies: 19 September 2026
  • Weakness: CWE-276
  • First seen by Risk Letters: 16 September 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD