Vulnerability Intelligence Report
Acronis Backup Incorrect Default Permissions Vulnerability
CVE-2026-87886
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.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
7.8
HIGH
Exploitability:1.9
Impact Score:5.9
EPSS Probability:0.28%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-276 ↗CWE-276
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Acronis | Acronis Backup plugin for cPanel & WHM | unspecified < 1.9.3.1021 (affected) |
| Acronis | Acronis Backup extension for Plesk | unspecified < 1.8.11.638 (affected) |
| Acronis | Acronis Backup plugin for DirectAdmin | unspecified < 1.2.3.238 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Acronis International GmbH · Vendor · Switzerland |
| Reserved | 2026-09-09T14:04:36 |
| Published | 2026-09-17T22:57:18 |
| Last Updated | 2026-09-18T14:33:42 |
Community Chatter & Buzz