How severe is CVE-2021-31804?

CVE-2021-31804 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-31804 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31804?

CVE-2021-31804 affects Leocad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31804?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-31804 published?

CVE-2021-31804 was published on 2021-04-26 and last updated on 2026-06-17.

CVE-2021-31804

CVE-2021-31804 is a medium-severity vulnerability in Leocad with a CVSS 3.x base score of 5.5. 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-416.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-416
Affected product: Leocad
Published: 2021-04-26
Last modified: 2026-06-17

Description

LeoCAD before 21.03 sometimes allows a use-after-free during the opening of a new document.

Frequently asked questions

What is CVE-2021-31804?: LeoCAD before 21.03 sometimes allows a use-after-free during the opening of a new document.
How severe is CVE-2021-31804?: CVE-2021-31804 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-31804 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31804?: CVE-2021-31804 affects Leocad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31804?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31804 published?: CVE-2021-31804 was published on 2021-04-26 and last updated on 2026-06-17.

References

https://github.com/leozide/leocad/issues/645

Affected products (1)

cpe:2.3:a:leocad:leocad:*:*:*:*:*:*:*:*

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