HOMEVULNERABILITIESCVE-2021-25173
HIGH

CVE-2021-25173

CWE-770Published: January 18, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official 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).

NVD Source

Technical Analysis

CVE-2021-25173 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

opendesign1 product(s)
drawings software development kit
siemens3 product(s)
comosjt2goteamcenter visualization
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (8)

→
https://cert-portal.siemens.com/productcert/pdf/ssa-155599.pdfPatch · Third Party Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-663999.pdfPatch · Third Party Advisory
→
https://www.opendesign.com/security-advisoriesVendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-21-225/Third Party Advisory · VDB Entry
→
https://cert-portal.siemens.com/productcert/pdf/ssa-155599.pdfPatch · Third Party Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-663999.pdfPatch · Third Party Advisory
→
https://www.opendesign.com/security-advisoriesVendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-21-225/Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2021-25173
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-770
CISA KEVNo
Affected2 vendor(s)
PublishedJan 18, 2021

Related CVEs (CWE-770)

CVE-2022-3273
9.8
CVE-2023-38507
9.8
CVE-2022-3456
9.8
CVE-2022-3439
9.8
CVE-2018-20033
9.8
CVE-2025-11832
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-25173 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2021-25173·NVD