TI-2021-20058 Aliases CVE-2021-44444 GHSA-vr7j-j9jw-pjj7

Out-of-bounds read in Siemens JT Utilities

LOW 18CWE-125Published 2021-12-14 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

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-15052)

Why it matters now

EPSS 0.01136 66th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed JT Utilities (Siemens): V13.1.1.0JTTK (Siemens): V11.1.1.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Siemens	JT Utilities	before V13.1.1.0	V13.1.1.0	Patch available	CNA
Siemens	JTTK	before V11.1.1.0	V11.1.1.0	Patch available	CNA

JT Utilities VendorSiemens Affected before V13.1.1.0 Fixed in V13.1.1.0 Patch available CNA
JTTK VendorSiemens Affected before V11.1.1.0 Fixed in V11.1.1.0 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:siemens:jt_open_toolkit::::::::	before 11.1.1.0	Vulnerable	Siemens
cpe:2.3:a:siemens:jt_utilities::::::::	before 13.1.1.0	Vulnerable	Siemens

cpe:2.3:a:siemens:jt_open_toolkit:*:*:*:*:*:*:*:* Versions before 11.1.1.0 Vulnerable ·Siemens
cpe:2.3:a:siemens:jt_utilities:*:*:*:*:*:*:*:* Versions before 13.1.1.0 Vulnerable ·Siemens

Remediation

Fix · CNA JT Utilities (Siemens) Fixed in V13.1.1.0
Fix · CNA JTTK (Siemens) Fixed in V11.1.1.0

Timeline

2026-10-02 Threatist record created from CVE-2021-44444
2026-10-03 Alias added: GHSA-vr7j-j9jw-pjj7

References

Exploit 1

http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html

Advisory 1

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

TI-2021-19766 Use after free in Siemens JT Open CVSS 3.1HIGH 7.8
TI-2021-19754 Out-of-bounds write in Siemens JT Open CVSS 3.1HIGH 7.8
TI-2022-23749 Memory corruption in Siemens JT Open CVSS 3.1HIGH 7.8
TI-2022-20204 A vulnerability has been identified in JTTK (All versions < V11.1.1.0), Simcenter Femap… CVSS 3.1HIGH 7.8
TI-2021-20063 Out-of-bounds write in Siemens JT Utilities CVSS 3.1HIGH 7.8
TI-2021-20061 Use after free in Siemens JT Utilities CVSS 3.1HIGH 7.8

See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences