CVE Watch18 sept 2026

CVE-2026-87886

Acronis Backup Incorrect Default Permissions Vulnerability

CVSS

7.8

Alto

EPSS

0.2%

p14

KEV

SÍ

16 sept 2026

Exploit Today

0-100

Publicado: 17 sept 2026 · Última mod.: 18 sept 2026 · CWE-276

EPSS · 30d

0.2%EPSS · 30 días0.2%

2026-10-032026-10-31

Ficha del catálogo KEV

Producto

Acronis / Backup

Vulnerabilidad

Acronis Backup Incorrect Default Permissions Vulnerability

Añadido a KEV

16 sept 2026

Remediar antes de

19 sept 2026

Uso conocido en ransomware

Descripción resumida

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

Acción requerida

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.

Notas

https://security-advisory.acronis.com/advisories/SEC-10986 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-87886

Descripción técnica

Local privilege escalation due to insecure file permissions. The following products are affected: Acronis Backup plugin for cPanel & WHM (Linux) before build 1.9.3.1021, Acronis Backup extension for Plesk (Linux) before build 1.8.11.638, Acronis Backup plugin for DirectAdmin (Linux) before build 1.2.3.238.

Referencias oficiales

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