How severe is CVE-2021-43391?

CVE-2021-43391 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43391?

CVE-2021-43391 affects Opendesign Drawings Software Development Kit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43391?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-43391 published?

CVE-2021-43391 was published on 2021-11-14 and last updated on 2026-06-17.

CVE-2021-43391

CVE-2021-43391 is a high-severity vulnerability in Opendesign Drawings Software Development Kit with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Opendesign Drawings Software Development Kit
Published: 2021-11-14
Last modified: 2026-06-17

Description

An Out-of-Bounds Read vulnerability exists when reading a DXF file using Open Design Alliance Drawings SDK before 2022.11. The specific issue exists within the parsing of DXF files. Crafted data in a DXF file (an invalid dash counter in line types) can trigger a read past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

Frequently asked questions

What is CVE-2021-43391?: An Out-of-Bounds Read vulnerability exists when reading a DXF file using Open Design Alliance Drawings SDK before 2022.11. The specific issue exists within the parsing of DXF files. Crafted data in a DXF file (an invalid dash counter in line types) can trigger a read past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
How severe is CVE-2021-43391?: CVE-2021-43391 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43391?: CVE-2021-43391 affects Opendesign Drawings Software Development Kit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-43391 published?: CVE-2021-43391 was published on 2021-11-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opendesign:drawings_software_development_kit:*:*:*:*:*:*:*:*

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