CVE-2021-44434: Siemens Jt Open Toolkit

High severity, CVSS 7.8. EPSS: 0.8% chance of exploitation in the next 30 days.

A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected products is vulnerable to an out of bounds write past the end of an allocated structure while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process. (ZDI-CAN-14902, ZDI-CAN-14866)

Affected products

• Siemens Jt Open Toolkit: before 11.1.1.0 (fixed in 11.1.1.0)
• Siemens Jt Utilities: before 13.1.1.0 (fixed in 13.1.1.0)

Published 2021-12-14. Last modified 2026-06-17.