Acronis backup plugin flaw exploited in targeted attacks (CVE-2026-87886)
Acronis warns CVE-2026-87886, an authenticated Linux privilege escalation flaw in its cPanel, WHM, and Plesk backup plugins, is under limited targeted exploitation; patches released.
Acronis disclosed CVE-2026-87886, a privilege escalation vulnerability caused by insecure file permissions in its backup plugins for cPanel, WHM, and Plesk, platforms popular among hosting providers and MSPs. Exploitation has been detected in the wild in limited, targeted attacks against cPanel & WHM deployments, with no exploitation observed on Plesk so far, and the low-complexity attack requires no user interaction. Fixes shipped last week: backup plugin version 1.9.3 HF3 for cPanel & WHM and extension version 1.8.11 for Plesk.
- Authenticated attackers gain local privilege escalation via insecure file permissions
- Exploitation confirmed in the wild against cPanel & WHM deployments only
- Low-complexity attack requires no user interaction
- Fixed versions: cPanel & WHM plugin 1.9.3 HF3, Plesk extension 1.8.11
- CVEs
- CVE-2026-87886
- Organizations
- Help Net Security
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-87886 | Incorrect Default Permissions in Acronis Backup Plugin for cPanel & WHM and Plesk Enable Privilege Escalation | 7.8 | <1% | KEV | KEV |
From the original article
1 min read at helpnetsecurity.com
A Linux privilege escalation vulnerability (CVE-2026-87886) affecting Acronis’ backup extensions for cPanel, WebHost Manager (WHM), and Plesk, is being leveraged by attackers, the backup and recovery company warns.
By Zeljka Zorz · helpnetsecurity.com
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