CVE-2026-68488 - A Time-of-check Time-of-use (TOCTOU) race condition leading to insecure symlink following in Plesk causes local privilege escalation to root via arbitrary file/directory ownership takeover

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CRITICAL

A Time-of-check Time-of-use (TOCTOU) race condition leading to insecure symlink following in Plesk causes local privilege escalation to root via arbitrary file/directory ownership takeover

Published Sep 10, 2026

9.9

CRITICAL

CVSS 3.0

EPSS 0.40%

Description

A Time-of-check Time-of-use (TOCTOU) race condition leading to insecure symlink following in Plesk causes local privilege escalation to root via arbitrary file/directory ownership takeover.

Affected products

Vendor WebPros Product Plesk Default
unaffected
- Version
  0
  Status
  affected
  Constraints
  <=18.0.79.10
- Version
  0
  Status
  affected
  Constraints
  <=18.0.80.6

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

WebPros

Plesk

unaffected

Version	Status	Constraints
0	affected	<=18.0.79.10
0	affected	<=18.0.80.6

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-367

References (2)

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-75594		Advisory
https://support.plesk.com/hc/en-us/articles/43248932867351-Vulnerability-in-Plesk-s-Backup-Manager-symlink-race-during-restore-allows-root-privilege-escalation