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Acronis Backup plugin for cPanel & WHM

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Acronis cPanel Backup Plugin Vulnerability Exploited in Targeted Attacks

Acronis warns CVE-2026-87886, a local privilege escalation flaw in its cPanel/WHM and Plesk backup plugins, is exploited in targeted attacks.

Acronis disclosed CVE-2026-87886 (CVSS 7.8), a high-severity local privilege escalation caused by insecure file permissions in its Backup plugin for cPanel & WHM and Backup extension for Plesk on Linux. Affected versions include cPanel & WHM plugin builds before 1.9.3.1021 (fixed in 1.9.3 HF3) and Plesk extension builds before 1.8.11.638. A low-privileged attacker could escalate permissions and potentially run arbitrary code, impacting confidentiality and integrity of the application. Acronis says exploitation has been detected in the wild in limited, targeted attacks, but has not identified the attackers, timing, or objectives.

The Hacker Newsupdated · 5h agofirst · 1d agoExploit / PoC in the wild 7 sourcesCVE-2026-87886

Acronis Backup Plugin Vulnerability Exploited in the Wild to Gain Elevated Linux Privileges

Acronis patched CVE-2026-87886 (CVSS 7.8), a local privilege escalation flaw in its cPanel & WHM backup plugin already exploited in targeted attacks.

Acronis released an urgent update for CVE-2026-87886 (CVSS 7.8), an insecure file permissions issue (CWE-276) in its Backup plugin for cPanel & WHM that lets a low-privileged local user elevate privileges on Linux servers. The company confirmed exploitation in limited, targeted attacks against cPanel & WHM deployments; the Plesk extension is also affected but no exploitation was observed there. Fixes are version 1.9.3 HF3 (build 1.9.3.1021 or later) for cPanel & WHM and 1.8.11 (build 1.8.11.638 or later) for Plesk.

GBHackersupdated · 5h agofirst · 1d agoExploit / PoC in the wild 7 sourcesCVE-2026-87886

Acronis Patches Exploited Vulnerability in cPanel Backup Plugin

Acronis urgently patched CVE-2026-87886 (CVSS 7.8), insecure file permissions enabling privilege escalation, exploited in targeted attacks on cPanel & WHM backups.

Acronis released urgent patches for CVE-2026-87886 (CVSS 7.8), insecure file permissions in the Backup plugin for cPanel & WHM and the Backup extension for Plesk that allow attackers to gain elevated privileges. Exploitation has been detected in the wild in limited, targeted attacks against the cPanel & WHM plugin, but not against the Plesk extension. All Linux versions of the plugin before build 1.9.3.1021 and the Plesk extension before build 1.8.11.638 are affected; Acronis urges immediate updates and has not shared technical details.

SecurityWeekupdated · 5h agofirst · 1d agoExploit / PoC in the wild 7 sourcesCVE-2026-87886

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.

Help Net Securityupdated · 5h agofirst · 1d agoExploit / PoC in the wild 7 sourcesCVE-2026-87886

Acronis Plugin Vulnerability in cPanel and Plesk Exploited in the Wild

Acronis patched CVE-2026-87886 (CVSS 7.8), a local privilege escalation flaw in its cPanel and Plesk backup plugins, exploited in targeted attacks.

Acronis released fixes for CVE-2026-87886 (CVSS 7.8, CWE-276), an insecure file permissions flaw in Linux-based backup components for cPanel & WHM and Plesk that enables local privilege escalation. The vendor observed limited, targeted exploitation in the wild before patches shipped. Fixes are available in Backup plugin for cPanel & WHM 1.9.3 HF3 and Backup extension for Plesk 1.8.11. A local attacker with low privileges could gain elevated access to backup data, control panels, and other customer accounts on shared hosting infrastructure.

Cyber Security Newsupdated · 5h agofirst · 1d agoExploit / PoC in the wild 7 sourcesCVE-2026-87886

Related CVEs

  • CVE-2026-87886——
    Incorrect Default Permissions in Acronis Backup Plugin for cPanel & WHM and Plesk Enable Privilege Escalation
    CVE-2026-87886 is an incorrect default permissions flaw (CWE-276) in the Acronis Backup plugin for cPanel & WHM and the Acronis Backup extension for Plesk. Because files or objects installed by the plugin/extension carry overly permissive default permissions, a local attacker with low-privileged access to a Linux hosting server can abuse them to escalate privileges. Successful exploitation grants elevated Linux privileges on the hosting server, which could enable persistence, access to hosted customer data, or further lateral movement. Any hosting provider or administrator running the Acronis Backup integration on cPanel & WHM or Plesk servers is affected. The flaw was added to the CISA KEV catalog on 2026-09-16, and multiple reports describe targeted attacks exploiting it in the wild, though no public proof-of-concept is known and ransomware use is undetermined.
    · Acronis Backup plugin for cPanel & WHM · Acronis Backup extension for Plesk KEVmoderate

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vendor cPanel 5vendor Plesk 5vendor Acronis 5product Acronis Backup extension for Plesk 4organization Acronis 2product Backup extension for Plesk 1organization Help Net Security 1
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