What’s Vulnerable › Vulnerabilities

CVE-2021-25173

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-18 · updated 2026-06-17
• Weakness: CWE-770

Description

An issue was discovered in Open Design Alliance Drawings SDK before 2021.12. A memory allocation with excessive size vulnerability exists when reading malformed DGN files, which allows attackers to cause a crash, potentially enabling denial of service (crash, exit, or restart).

Affected products

• Opendesign Drawings Software Development Kit: before 2021.12 — fixed in 2021.12
• Siemens COMOS: before 10.4.1 — fixed in 10.4.1
• Siemens JT2Go: before 13.1.0.1 — fixed in 13.1.0.1
• Siemens Teamcenter Visualization: before 13.1.0.1 — fixed in 13.1.0.1

How to fix

Upgrade to a fixed version: Opendesign Drawings Software Development Kit 2021.12; Siemens COMOS 10.4.1; Siemens JT2Go 13.1.0.1; Siemens Teamcenter Visualization 13.1.0.1. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-155599.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-663999.pdf
• https://www.opendesign.com/security-advisories
• https://www.zerodayinitiative.com/advisories/ZDI-21-225/
• https://cert-portal.siemens.com/productcert/pdf/ssa-155599.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-663999.pdf
• https://www.opendesign.com/security-advisories
• https://www.zerodayinitiative.com/advisories/ZDI-21-225/

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