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Vulnerability record · CVE-2021-44439 · published 14 December 2021

CVE-2021-44439: Siemens jt open toolkit out-of-bounds read vulnerability

Siemens · Jt Open Toolkit

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 read past the end of an allocated buffer when parsing specially crafted JT files. An attacker could leverage this vulnerability to leak information in the context of the current process. (ZDI-CAN-14908)

7.8 CVSS 3.1 High EPSS 0.63% · top 51.6% CWE-125 · Out-of-bounds read
7.8CVSS 3.1 base score, v2 6.8
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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 an out of bounds read past the end of an allocated buffer when parsing specially crafted JT files. An attacker could leverage this vulnerability to leak information in the context of the current process. (ZDI-CAN-14908)

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-802578.pdf Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-802578.pdf Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-44439), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.