CVE-2026-87886

At a glance

Severity: HIGH 7.8
Exploitation: Known exploited (CISA KEV) · added 2026-09-16
Exploited per ENISA since 2026-09-16
EPSS: EPSS 0.23 % · percentile 14 (2026-10-27)
State: PUBLISHED
Published: 2026-09-17
Updated: 2026-09-18
Assigner: Acronis
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.0	HIGH 7.8	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Acronis
CVSS 3.0	HIGH 7.8	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · security@acronis.com (Secondary)

Weaknesses (CWE)

CWE-276

European references

ENISA EUVD · EUVD-2026-82595
GCVE · GCVE-0-2026-87886

Affected configurations (NVD CPE)

cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:directadmin:*:* < 1.2.3
cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:plesk:*:* < 1.8.11
cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:cpanel:*:* < 1.9.3
cpe:2.3:a:acronis:acronis_backup:1.9.3:-:*:*:*:cpanel:*:*
cpe:2.3:a:acronis:acronis_backup:1.9.3:hotfix1:*:*:*:cpanel:*:*
cpe:2.3:a:acronis:acronis_backup:1.9.3:hotfix2:*:*:*:cpanel:*:*

Affected products

Product	Versions
Acronis · Acronis Backup plugin for cPanel & WHM	affected unspecified < 1.9.3.1021
Acronis · Acronis Backup extension for Plesk	affected unspecified < 1.8.11.638
Acronis · Acronis Backup plugin for DirectAdmin	affected unspecified < 1.2.3.238

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
CISA Known Exploited Vulnerabilities	CC0 1.0
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD