CVE-2026-87886

CVE Enrichment

CVSS: 7.8 HIGH
EPSS: 0.23%
EPSS Percentile: 13.12%
CISA KEV: YES — Known Exploited Vulnerability

Description

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.

Technical Details

CVSS Version: 3.0
CNA / NVD Source: security@acronis.com
Published: 18-Sep-2026 06:18
Last Modified: 19-Sep-2026 02:29
EPSS Date: 2026-10-13
CWE: CWE-276

CVSS Vector


            CVSS:3.0                            AV:L /
                            AC:L /
                            PR:L /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

CISA KEV Details

Date Added: 2026-09-16
Remediation Due: 2026-09-19
Known Ransomware Campaign Use: Unknown
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 each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Notes: 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

Affected Products / Versions

acronis / acronis_backup
Version / affected range: * · before (exclusive) 1.2.3
cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:directadmin:*:*
acronis / acronis_backup
Version / affected range: * · before (exclusive) 1.8.11
cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:plesk:*:*
acronis / acronis_backup
Version / affected range: * · before (exclusive) 1.9.3
cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:cpanel:*:*
acronis / acronis_backup
Version / affected range: 1.9.3
cpe:2.3:a:acronis:acronis_backup:1.9.3:-:*:*:*:cpanel:*:*
acronis / acronis_backup
Version / affected range: 1.9.3
cpe:2.3:a:acronis:acronis_backup:1.9.3:hotfix1:*:*:*:cpanel:*:*
acronis / acronis_backup
Version / affected range: 1.9.3
cpe:2.3:a:acronis:acronis_backup:1.9.3:hotfix2:*:*:*:cpanel:*:*

References

Last enrichment sync: 14-Oct-2026 07:45
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

CVE-2026-87886 Recorded Future Reports 94 High-Impact Vulnerabilities in September 2026, Including 80 Actively Exploited

CVE (76)

Malware (6)

Threat Actors (8)

Vendors (10)

Products (67)

Tools (7)

Industries (1)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.