What is CVE-2021-34477?

CVE-2021-34477 is a high-severity vulnerability in Microsoft .Net Education Bundle Sdk Install Tool, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2021-07-14.

How severe is CVE-2021-34477?

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

Privilege escalation in Microsoft .Net Education Bundle Sdk Install Tool

CVE-2021-34477

Visual Studio Code .NET Runtime Elevation of Privilege Vulnerability

Vulnerability class: Privilege Escalation

Published 2021-07-14 · last modified 2026-08-10.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (45.2th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Microsoft .Net Education Bundle Sdk Install Tool — versions 0.0.0
Microsoft .Net Education Bundle Sdk Install Tool
Microsoft .Net Install Tool For Extension Authors — versions 1.0.0
Microsoft .Net Install Tool For Extension Authors

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34477 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2021-34477?: CVE-2021-34477 is a high-severity vulnerability in Microsoft .Net Education Bundle Sdk Install Tool, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2021-07-14.
How severe is CVE-2021-34477?: High severity. CVSS v3 base score is 7.8 out of 10.