How severe is CVE-2021-27083?

CVE-2021-27083 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-2021-27083 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 63% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27083?

CVE-2021-27083 affects Microsoft Remote Development. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27083?

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-2021-27083 published?

CVE-2021-27083 was published on 2021-03-11 and last updated on 2026-06-17.

CVE-2021-27083

CVE-2021-27083 is a high-severity vulnerability in Microsoft Remote Development with a CVSS 3.x base score of 7.8. Its EPSS exploit-prediction score of 63% 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: 63% (99th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Remote Development
Published: 2021-03-11
Last modified: 2026-06-17

Description

Remote Development Extension for Visual Studio Code Remote Code Execution Vulnerability

Frequently asked questions

What is CVE-2021-27083?: Remote Development Extension for Visual Studio Code Remote Code Execution Vulnerability
How severe is CVE-2021-27083?: CVE-2021-27083 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-2021-27083 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 63% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27083?: CVE-2021-27083 affects Microsoft Remote Development. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27083?: 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-2021-27083 published?: CVE-2021-27083 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-2021-27083

Affected products (1)

cpe:2.3:o:microsoft:remote_development:-:*:*:*:*:visual_studio_code:*:*