Local privilege escalation due to insecure file permissions
Published Sep 17, 2026 ·Due Sep 19, 2026
7.8
HIGHCVSS 3.0
EPSS 0.23%
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.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<1.8.11.638
- Version
-
- Version unspecifiedStatusaffectedConstraints<1.2.3.238
- Version
-
- Version unspecifiedStatusaffectedConstraints<1.9.3.1021
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Acronis | Acronis Backup extension for Plesk | unaffected |
| ||||||
| Acronis | Acronis Backup plugin for DirectAdmin | unaffected |
| ||||||
| Acronis | Acronis Backup plugin for cPanel & WHM | unaffected |
|
- < 1.2.3
- < 1.8.11
- < 1.9.3
- 1.9.3
- 1.9.3
- 1.9.3
Running on/with
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v2.0 score for this CVE.
Date Added
Sep 16, 2026
Patch Due
Sep 19, 2026
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.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Sep 18, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.23% (0.00233) | 12.84th | v5 (v2026.06.15) |
| Sep 18, 2026 | 0.28% (0.00281) | 20.81th | v5 (v2026.06.15) |
References (2)
- https://security-advisory.acronis.com/advisories/SEC-10986 vendor-advisoryVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886 exploitUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| https://security-advisory.acronis.com/advisories/SEC-10986 | vendor-advisoryVendor Advisory | |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886 | exploitUS Government Resource |
Change history (0)
No recorded changes yet.