CVE-2026-87886Local privilege escalation due to insecure file permissions.
Updated under an hour ago ()
Does this affect you?
It affects Acronis Backup plugin for cPanel & WHM and 3 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Sep 16, 2026; federal agencies had to remediate by Sep 19, 2026. Treat that date as your deadline.
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Free account, 1 product
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.
- CVSS
- 7.8 HIGH (v3.0, CNA)CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-276
- Known exploited
- Added to CISA KEV Sep 16, 2026; federal remediation due Sep 19, 2026Apply 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.
- EPSS (exploitation in the next 30 days)
- 0.23% (percentile 13)
- Assigned by
- Acronis
- NVD analysis
- Analyzed
- Record last updated
- Sep 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Acronis Acronis Backup plugin for cPanel & WHM acronis:backup_plugin_for_cpanel_and_whm (from the name) | from unspecified before 1.9.3.1021 | CNA record |
Acronis Acronis Backup extension for Plesk acronis:backup_extension_for_plesk (from the name) | from unspecified before 1.8.11.638 | CNA record |
Acronis Acronis Backup plugin for DirectAdmin acronis:backup_plugin_for_directadmin (from the name) | from unspecified before 1.2.3.238 | CNA record |
acronis acronis_backup acronis:acronis_backup | before 1.2.3; before 1.8.11; before 1.9.3; 1.9.3; 1.9.3; 1.9.3 | NVD |
References
- https://security-advisory.acronis.com/advisories/SEC-10986vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.