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CVE-2021-43391

26
FAUCET Score

CVE-2021-43391 is an Out-of-Bounds Read vulnerability in Open Design Alliance Drawings SDK versions prior to 2022.11, specifically affecting the parsing of DXF files. A specially crafted DXF file containing an invalid dash counter in line types can cause the software to read beyond an allocated buffer. This vulnerability carries a CVSS score of 7.8 (High), indicating that an attacker could achieve code execution in the context of the current process through local access and user interaction. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2022.11CPE matchmatch criteria
cpe:2.3:a:opendesign:drawings_software_development_kit:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.63%
Probability of exploitation in next 30 days
EPSS Percentile
73.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0163 is in the 72nd percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cert-portal.siemens.com / productcert/pdf/ssa-491245.pdf
opendesign.com / security-advisories
Vendor Advisory
zerodayinitiative.com / advisories/ZDI-21-1352
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-21-1361
Third Party AdvisoryVDB Entry