CVE-2021-44442: 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 contains an out of bounds write past the fixed-length heap-based buffer while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process. (ZDI-CAN-14995)

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.