What’s Vulnerable › Vulnerabilities

CVE-2021-34331

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-13 · updated 2026-06-17
• Weakness: CWE-787

Description

A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Jt981.dll library in affected applications lacks proper validation of user-supplied data when parsing JT files. This could result in an out of bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13442)

Affected products

• Siemens JT2Go: before 13.2.0 — fixed in 13.2.0
• Siemens Teamcenter Visualization: before 13.2.0 — fixed in 13.2.0

How to fix

Upgrade to a fixed version: Siemens JT2Go 13.2.0; Siemens Teamcenter Visualization 13.2.0. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-483182.pdf
• https://www.zerodayinitiative.com/advisories/ZDI-21-869/
• https://cert-portal.siemens.com/productcert/pdf/ssa-483182.pdf
• https://www.zerodayinitiative.com/advisories/ZDI-21-869/

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