What is CVE-2021-43208?

CVE-2021-43208 is a high-severity vulnerability in Microsoft 3d Viewer, classified under Code Injection. CVSS score: 7.8/10. Published 2021-11-10.

How severe is CVE-2021-43208?

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

RCE in Microsoft 3d Viewer

CVE-2021-43208

3D Viewer Remote Code Execution Vulnerability

Vulnerability class: RCE (Remote Code Execution)

Published 2021-11-10 · last modified 2026-08-19.

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: 0.043 (90.8th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.041 · newest: 0.043 · change: +0.002

Affected products

Microsoft 3d Viewer — versions 7.0.0
Microsoft 3d Viewer

Weakness classification (CWE)

CWE-94 — Code Injection

References

af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
msrc.microsoft.com/update-guide/vulnerability/CVE-2021-43208 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2021-43208?: CVE-2021-43208 is a high-severity vulnerability in Microsoft 3d Viewer, classified under Code Injection. CVSS score: 7.8/10. Published 2021-11-10.
How severe is CVE-2021-43208?: High severity. CVSS v3 base score is 7.8 out of 10.