What is CVE-2021-27084?

CVE-2021-27084 is a high-severity vulnerability in Microsoft Maven For Java. CVSS score: 7.8/10. Published 2021-03-11.

How severe is CVE-2021-27084?

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

Vulnerability in Microsoft Maven For Java

CVE-2021-27084

Visual Studio Code Java Extension Pack 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: 0.621 (99.2th percentile), scored 2026-10-29.

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: 0.621 · newest: 0.621 · change: 0.000

Affected products

Microsoft Maven For Java
Microsoft Visual Studio Code - Java Extension Pack — versions 0.5.0

References

af854a3a-2127-422b-91ae-364da2661108 (Patch, Third Party Advisory)
msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27084 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2021-27084?: CVE-2021-27084 is a high-severity vulnerability in Microsoft Maven For Java. CVSS score: 7.8/10. Published 2021-03-11.
How severe is CVE-2021-27084?: High severity. CVSS v3 base score is 7.8 out of 10.