CVE-2021-44435

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-14 · updated 2026-06-17
Weakness: CWE-121

Description

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 stack based buffer overflow while parsing specially crafted JT files. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-14903)

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

How to fix

Upgrade to a fixed version: Siemens Jt Open Toolkit 11.1.1.0; Siemens JT Utilities 13.1.1.0. Check the vendor advisory for mitigations.

References

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