CVE-2026-44469: Codesys Development System

High severity, CVSS 7.0. EPSS: 0.1% chance of exploitation in the next 30 days.

The affected product extracts installation files to a temporary directory with incorrect default permissions during administrative installation. A low-privileged local attacker can exploit a TOCTOU race condition with a practical time window to replace verified files with malicious ones before installation, resulting in local privilege escalation.

Affected products

• Codesys Development System: before 3.5.22.20 (fixed in 3.5.22.20)

Published 2026-05-26. Last modified 2026-07-24.