CVE-2026-2364: Codesys Installer

High severity, CVSS 7.3. EPSS: 0.1% chance of exploitation in the next 30 days.

If a legitimate user confirms a self-update prompt or initiate an installation of a CODESYS Development System, a low privileged local attacker can gain elevated rights due to a TOCTOU vulnerability in the CODESYS installer.

Affected products

• Codesys Codesys Installer: from 0.0.0, before 2.6.1.0 (fixed in 2.6.1.0)

Published 2026-03-10. Last modified 2026-06-17.