What is CVE-2021-25174?

CVE-2021-25174 is a high-severity vulnerability in Opendesign Drawings Software Development Kit, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-01-18.

How severe is CVE-2021-25174?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Opendesign Drawings Software Development Kit

CVE-2021-25174

An issue was discovered in Open Design Alliance Drawings SDK before 2021.12. A memory corruption vulnerability exists when reading malformed DGN files. It can allow attackers to cause a crash, potentially enabling denial of service (Crash, Exit, or Restart).

Vulnerability class: Buffer Overflow

Published 2021-01-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.022 (82.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.opendesign.com/security-advisories (Vendor Advisory)
cert-portal.siemens.com/productcert/pdf/ssa-663999.pdf (Patch, Third Party Advisory)
www.zerodayinitiative.com/advisories/ZDI-21-226/ (VDB Entry, Third Party Advisory)
cert-portal.siemens.com/productcert/pdf/ssa-155599.pdf (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-25174?: CVE-2021-25174 is a high-severity vulnerability in Opendesign Drawings Software Development Kit, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-01-18.
How severe is CVE-2021-25174?: High severity. CVSS v3 base score is 7.8 out of 10.