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CVE-2021-27084

57
FAUCET Score

CVE-2021-27084 describes a Remote Code Execution vulnerability within the Microsoft Visual Studio Code Java Extension Pack, specifically affecting the Maven for Java component. This high-severity vulnerability, rated 7.8 CVSS, can be exploited with low attack complexity through user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability. While not listed on the KEV catalog or having public exploit code like Metasploit or ExploitDB, it received limited community discussion and media coverage, primarily noted during Microsoft's March 2021 Patch Tuesday.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:maven_for_java:-:*:*:*:*:visual_studio_code:*:*

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
61.36%
Probability of exploitation in next 30 days
EPSS Percentile
99.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.6136 is in the 99th 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: Visual Studio Code - Java Extension Pack
View patch

Vendor Advisories (1)

microsoft2021-Mar/CVE-2021-27084Important

Visual Studio Code Java Extension Pack Remote Code Execution Vulnerability

Mar 9, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-27084
PatchThird Party Advisory