CVE-2021-43336

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.

Published: 2021-11-14 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-43336 is rated Moderate Risk (58.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.64%). EPSS rose +1.29% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-43336

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.35% 1.64% +1.29%
2 2026-04-11 0.36% 0.35% -0.01%
3 2025-10-29 — 0.36% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-43336

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2021-43336

Affected software / configurations for CVE-2021-43336

Vendor Product Version Raw CPE
opendesign drawings_software_development_kit < 2022.11 cpe:2.3:a:opendesign:drawings_software_development_kit:*:*:*:*:*:*:*:*
siemens jt2go — cpe:2.3:a:siemens:jt2go:*:*:*:*:*:*:*:*
siemens solid_edge se2022 cpe:2.3:a:siemens:solid_edge:se2022:-:*:*:*:*:*:*
siemens teamcenter_visualization >= 12.4.0, < 12.4.0.13 cpe:2.3:a:siemens:teamcenter_visualization:*:*:*:*:*:*:*:*
siemens teamcenter_visualization >= 13.2.0, < 13.3.0.1 cpe:2.3:a:siemens:teamcenter_visualization:*:*:*:*:*:*:*:*
siemens teamcenter_visualization 13.1.0 cpe:2.3:a:siemens:teamcenter_visualization:13.1.0:*:*:*:*:*:*:*

References for CVE-2021-43336

cvelogic Threat Intelligence