[悪用確認] CVE-2026-87886: Acronis Backup Incorrect Default Permissions Vulnerability

Acronis Backup Acronis Backup plugin for cPanel & WHM and extension for Plesk contains an incorrect default permissions vulnerability that could allow for privilege escalation. 対応: 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. (期限 2026-09-19)

CISA Known Exploited Vulnerabilitiesで読む

2026/09/16 09:00、CISA Known Exploited Vulnerabilitiesが「[悪用確認] CVE-2026-87886: Acronis Backup Incorrect Default Permissions Vulnerability」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「緊急」(critical) です。CVE: CVE-2026-87886。