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TI-2021-20064 Aliases CVE-2021-44450GHSA-jq43-mcx6-wp6q

Out-of-bounds read in Siemens JT Utilities

Priority LOW 35CWE-125Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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 is vulnerable to an out of bounds read past the end of an allocated buffer when parsing JT files. An attacker could leverage this vulnerability to leak information in the context of the current process. (ZDI-CAN-15055, ZDI-CAN-14915, ZDI-CAN-14865)

Why it matters now

EPSS 0.00654 51st percentileScored 2026-11-07
Fix Fixed JT Utilities (Siemens): V12.8.1.1JTTK (Siemens): V10.8.1.1

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensJT Utilitiesbefore V12.8.1.1V12.8.1.1Patch availableCNA
SiemensJTTKbefore V10.8.1.1V10.8.1.1Patch availableCNA
  • JT Utilities VendorSiemens Affected before V12.8.1.1 Fixed in V12.8.1.1 Patch available CNA
  • JTTK VendorSiemens Affected before V10.8.1.1 Fixed in V10.8.1.1 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:siemens:jt_open_toolkit:*:*:*:*:*:*:*:*before 10.8.8.1VulnerableSiemens
cpe:2.3:a:siemens:jt_utilities:*:*:*:*:*:*:*:*before 12.8.8.1VulnerableSiemens
  • cpe:2.3:a:siemens:jt_open_toolkit:*:*:*:*:*:*:*:* Versions before 10.8.8.1 Vulnerable ·Siemens
  • cpe:2.3:a:siemens:jt_utilities:*:*:*:*:*:*:*:* Versions before 12.8.8.1 Vulnerable ·Siemens

Remediation

  • Fix · CNA JT Utilities (Siemens) Fixed in V12.8.1.1
  • Fix · CNA JTTK (Siemens) Fixed in V10.8.1.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-44450
  2. 2026-10-03 Alias added: GHSA-jq43-mcx6-wp6q
  3. 2026-10-14 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • 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