---
title: "CVE-2026-87886: Acronis Backup - Privilege Escalation"
description: "Acronis Backup plugins for cPanel & WHM, Plesk, and DirectAdmin on Linux before specified builds contain a local privilege escalation caused by insecure file permissions, letting local attackers escalate privileges, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-87886/
---

# CVE-2026-87886 Acronis Backup - Privilege Escalation

Acronis Backup plugins for cPanel & WHM, Plesk, and DirectAdmin on Linux before specified builds contain a local privilege escalation caused by insecure file permissions, letting local attackers escalate privileges, exploit requires local access.

CVSS base score 7.8 /10

High

CISA KEV

Exploited in the wild

Public exploit

None known

Authentication

Required

EPSS

0.23% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-87886)

## Details

Type

Privilege Escalation

Impact

Privilege Escalation

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

Weakness

[CWE-276](https://cwe.mitre.org/data/definitions/276.html)

## Vendor fix

Update to build 1.9.3.1021 for cPanel & WHM, 1.8.11.638 for Plesk, and 1.2.3.238 for DirectAdmin or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-87886](https://nvd.nist.gov/vuln/detail/CVE-2026-87886)
- [https://security-advisory.acronis.com/updates/UPD-2609-3d72-20a7](https://security-advisory.acronis.com/updates/UPD-2609-3d72-20a7)
- [https://security-advisory.acronis.com/advisories/SEC-10986](https://security-advisory.acronis.com/advisories/SEC-10986)
- [https://www.cisa.gov/know%20n-exploited-vulnerabilities-catalog?field\_cve=CVE-2026-87886](https://www.cisa.gov/know%20n-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886)
- [https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field\_cve=CVE-2026-87886](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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