CVE record · CVE-2026-87886

Incorrect default permissions in Acronis Backup plugin for cPanel & WHM and others

CVSS 7.8 HighCriticalIn CISA KEVEPSS 0.0023 · 14th percentile

Critical, because:

In CISA’s KEV catalogue since 16 Sept 2026: it is known to be exploited.

Published by the CVE Program (CNA: Acronis) at 17 Sept 2026, 22:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Acronis	Acronis Backup plugin for cPanel & WHM	affected unspecified to before 1.9.3.1021 semver Other versions: unaffected
Acronis	Acronis Backup extension for Plesk	affected unspecified to before 1.8.11.638 semver Other versions: unaffected
Acronis	Acronis Backup plugin for DirectAdmin	affected unspecified to before 1.2.3.238 semver Other versions: unaffected

Identifiers: CVE-2026-87886
CNA: Acronis
Weakness (CWE): CWE-276
Tags: Acronis Backup plugin for cPanel & WHM
Acronis Backup extension for Plesk
Acronis Backup plugin for DirectAdmin
Broken access control
Published: 17 Sept 2026
Updated: 18 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.8	High	3.0	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (Acronis)

CISA KEV Listed since 16 Sept 2026: known to be exploited.
EPSS 0.0023, the 14th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 17 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

security-advisory.acronis.com/advisories/SEC-10986 vendor-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.