How severe is CVE-2021-27084?

CVE-2021-27084 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-27084 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 61% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27084?

CVE-2021-27084 affects Microsoft Maven For Java. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27084?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-27084 published?

CVE-2021-27084 was published on 2021-03-11 and last updated on 2026-06-17.

CVE-2021-27084

CVE-2021-27084 is a high-severity vulnerability in Microsoft Maven For Java with a CVSS 3.x base score of 7.8. Its EPSS exploit-prediction score of 61% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 61% (99th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Maven For Java
Published: 2021-03-11
Last modified: 2026-06-17

Description

Visual Studio Code Java Extension Pack Remote Code Execution Vulnerability

Frequently asked questions

What is CVE-2021-27084?: Visual Studio Code Java Extension Pack Remote Code Execution Vulnerability
How severe is CVE-2021-27084?: CVE-2021-27084 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-27084 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 61% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27084?: CVE-2021-27084 affects Microsoft Maven For Java. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27084?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-27084 published?: CVE-2021-27084 was published on 2021-03-11 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27084

Affected products (1)

cpe:2.3:a:microsoft:maven_for_java:-:*:*:*:*:visual_studio_code:*:*