How severe is CVE-2021-27083?

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

Vulnerability in Microsoft Remote Development

CVE-2021-27083

Remote Development Extension for Visual Studio Code Remote Code Execution Vulnerability

Published 2021-03-11 · 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: 0.622 (99.2th percentile), scored 2026-10-28.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.619 · newest: 0.622 · change: +0.003

Affected products

Microsoft Remote Development
Microsoft Visual Studio Code Remote - Containers Extension — versions 1.0.0

References

af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27083 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2021-27083?: CVE-2021-27083 is a high-severity vulnerability in Microsoft Remote Development. CVSS score: 7.8/10. Published 2021-03-11.
How severe is CVE-2021-27083?: High severity. CVSS v3 base score is 7.8 out of 10.