HOMEVULNERABILITIESCVE-2021-43336
HIGH

CVE-2021-43336

CWE-787Published: November 14, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

An Out-of-Bounds Write vulnerability exists when reading a DXF or DWG file using Open Design Alliance Drawings SDK before 2022.11. The specific issue exists within the parsing of DXF and DWG files. Crafted data in a DXF or DWG file (an invalid number of properties) can trigger a write operation past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

NVD Source

Technical Analysis

CVE-2021-43336 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.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

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)
jt2gosolid edgeteamcenter visualization
Source: NVD CPE · 5 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

ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-301589.pdf
ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-491245.pdf
ADVISORYhttps://www.opendesign.com/security-advisories
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-22-334/
ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-301589.pdf
ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-491245.pdf
ADVISORYhttps://www.opendesign.com/security-advisories
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-22-334/

All References (8)

→
https://cert-portal.siemens.com/productcert/pdf/ssa-301589.pdfThird Party Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-491245.pdfThird Party Advisory
→
https://www.opendesign.com/security-advisoriesVendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-22-334/Third Party Advisory · VDB Entry
→
https://cert-portal.siemens.com/productcert/pdf/ssa-301589.pdfThird Party Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-491245.pdfThird Party Advisory
→
https://www.opendesign.com/security-advisoriesVendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-22-334/Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2021-43336
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-787
CISA KEVNo
Affected2 vendor(s)
PublishedNov 14, 2021

Related CVEs (CWE-787)

CVE-2018-10718
10.0
CVE-2011-1807
10.0
CVE-2015-0235
10.0
CVE-2004-1287
10.0
CVE-2002-2227
10.0
CVE-2012-0751
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-43336 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.
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