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CVE-2021-43209

27
FAUCET Score

CVE-2021-43209 is a Remote Code Execution vulnerability affecting Microsoft 3D Viewer. This high-severity vulnerability (CVSS 7.8) can be exploited with low attack complexity, requiring user interaction, and could lead to complete compromise of confidentiality, integrity, and availability. While not actively exploited in the wild and lacking public exploit code, it has garnered some community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.2107.7012.0CPE matchmatch criteria
cpe:2.3:a:microsoft:3d_viewer:*:*:*:*:*:*:*:*
>= 7.0.0, < 7.2107.7012.0CPE match
cpe:2.3:a:microsoft:3d_viewer:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.94%
Probability of exploitation in next 30 days
EPSS Percentile
91.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0494 is in the 92nd percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 3D ViewerFixed in: 7.2107.7012.0
View patch

Vendor Advisories (1)

microsoft2021-Nov/CVE-2021-43209Important

3D Viewer Remote Code Execution Vulnerability

Nov 9, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-43209
PatchVendor Advisory
zerodayinitiative.com / advisories/ZDI-21-909
Third Party AdvisoryVDB Entry