How severe is CVE-2021-27068?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Microsoft Visual Studio 2019 Version 16.4 (Includes 16.0 - 16.3)

CVE-2021-27068

Visual Studio Remote Code Execution Vulnerability

Published 2021-05-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.536 (99.0th percentile), scored 2026-10-19.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.536 · newest: 0.536 · change: 0.000

Affected products

Microsoft Visual Studio 2019 Version 16.4 (Includes 16.0 - 16.3) — versions 16.0
Microsoft Visual Studio 2019 Version 16.7 (Includes 16.0 – 16.6) — versions 16.0.0
Microsoft Visual Studio 2019 Version 16.9 (Includes 16.0 - 16.8) — versions 15.0.0
Microsoft Visual Studio 2019

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27068 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-27068?: CVE-2021-27068 is a high-severity vulnerability in Microsoft Visual Studio 2019 Version 16.4 (Includes 16.0 - 16.3). CVSS score: 8.8/10. Published 2021-05-11.
How severe is CVE-2021-27068?: High severity. CVSS v3 base score is 8.8 out of 10.