Detections
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CVE-2026-87886

high

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.

References

https://security-advisory.acronis.com/advisories/SEC-10986

https://securityaffairs.com/199239/security/u-s-cisa-adds-acronis-backup-cisco-ise-and-google-pixel-flaws-to-its-known-exploited-vulnerabilities-catalog.html

https://www.securityweek.com/acronis-patches-exploited-vulnerability-in-cpanel-backup-plugin/

https://www.helpnetsecurity.com/2026/09/16/acronis-backup-plugin-vulnerability-exploited-cve-2026-87886/

https://www.cisa.gov/news-events/alerts/2026/09/16/cisa-adds-two-known-exploited-vulnerabilities-catalog

https://thehackernews.com/2026/09/acronis-cpanel-backup-plugin.html

https://www.bleepingcomputer.com/news/security/acronis-warns-of-actively-exploited-flaw-in-its-cpanel-backup-plugin/

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-82595

Details

Source: Mitre, NVD

Published: 2026-09-17

Updated: 2026-09-18

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

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

Severity: High

EPSS

EPSS: 0.00233

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest