CVE-2021-44449

Name: CVE-2021-44449
Creator: NVD / NIST
Published: 2021-12-14T12:15:11.923+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.81%

Last modified Jun 17, 2026

CVE-2021-44449 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A vulnerability has been identified in JT Utilities (All versions < V12.8.1.1), JTTK (All versions < V10.8.1.1). JTTK library in affected products contains an out of bounds write past the end of an allocated structure while parsing specially crafted JT files. EPSS estimates a 0.81% chance of exploitation in the next 30 days.

Description

A vulnerability has been identified in JT Utilities (All versions < V12.8.1.1), JTTK (All versions < V10.8.1.1). JTTK library in affected products contains 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-14830)

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.81%

52.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Siemens	Jt Open Toolkit	< 10.8.1.1
Siemens	Jt Utilities	< 12.8.1.1

References

https://cert-portal.siemens.com/productcert/pdf/ssa-396621.pdfVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-396621.pdfVendor Advisory

Timeline

Published: Dec 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-44449?

How severe is CVE-2021-44449?

CVE-2021-44449 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.81% probability of exploitation in the next 30 days.

How do I fix CVE-2021-44449?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-44449?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST