What is CVE-2021-31213?

CVE-2021-31213 is a high-severity vulnerability in Microsoft Remote. CVSS score: 7.8/10. Published 2021-05-11.

How severe is CVE-2021-31213?

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

Vulnerability in Microsoft Remote

CVE-2021-31213

Visual Studio Code Remote Containers Extension Remote Code Execution Vulnerability

Published 2021-05-11 · 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: 0.528 (99.0th percentile), scored 2026-10-29.

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: 0.528 · newest: 0.528 · change: 0.000

Affected products

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

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31213 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-31213?: CVE-2021-31213 is a high-severity vulnerability in Microsoft Remote. CVSS score: 7.8/10. Published 2021-05-11.
How severe is CVE-2021-31213?: High severity. CVSS v3 base score is 7.8 out of 10.