CVE-2026-68487Network attack vector

Root file write via unsigned backup header

Published Sep 10, 2026 · Updated Sep 10, 2026

Path traversal in WebPros Plesk Backup Manager for Linux allows remote authenticated users to write arbitrary files as root. Backup Manager accepts an unsigned backup header and uses its path without ensuring the resolved destination remains inside the intended backup location. Customer-level panel access is sufficient, and root-owned writes can produce full server compromise.

CVSS severity9.9
Critical
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in WebPros Plesk Backup Manager for Linux allows remote authenticated users to write arbitrary files as root. Backup Manager accepts an unsigned backup header and uses its path without ensuring the resolved destination remains inside the intended backup location. Customer-level panel access is sufficient, and root-owned writes can produce full server compromise.

The record

CVE
CVE-2026-68487
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
WebPros
Product
Plesk
Classifications
CWE-36, CAPEC-597, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=18.0.79.10
  2. Affected versionversion=0 <=18.0.80.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WebPros · Pleskversion=0 <=18.0.79.10; version=0 <=18.0.80.6

Published CVSS scores

9.9HackerOneCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-36Absolute Path Traversal
CAPEC-597Absolute Path Traversal
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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