CVE-2019-19789: Codesys Plcwinnt

Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days.

3S-Smart CODESYS SP Realtime NT before V2.3.7.28, CODESYS Runtime Toolkit 32 bit full before V2.4.7.54, and CODESYS PLCWinNT before V2.4.7.54 allow a NULL pointer dereference.

Affected products

• Codesys Plcwinnt: before 2.4.7.54 (fixed in 2.4.7.54)
• Codesys Runtime Toolkit: before 2.4.7.54 (fixed in 2.4.7.54)
• Codesys SP Realtime Nt: before 2.3.7.28 (fixed in 2.3.7.28)

Published 2019-12-20. Last modified 2026-06-17.