What is CVE-2023-21786?

CVE-2023-21786 is a high-severity vulnerability in Microsoft 3d Builder, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2023-01-10.

How severe is CVE-2023-21786?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Microsoft 3d Builder

CVE-2023-21786

3D Builder Remote Code Execution Vulnerability

Vulnerability class: Buffer Overflow

Published 2023-01-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Microsoft 3d Builder — versions 20.0.0
Microsoft 3d Builder

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21786 (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-21786?: CVE-2023-21786 is a high-severity vulnerability in Microsoft 3d Builder, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2023-01-10.
How severe is CVE-2023-21786?: High severity. CVSS v3 base score is 7.8 out of 10.