# CVE-2021-1675: Microsoft Windows Print Spooler Remote Code Execution Vulnerability

Source: https://junglewise.ai/threats/cve-2021-1675-microsoft-windows-print-spooler-remote-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2021-1675 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2021-11-03

The Microsoft Windows Print Spooler service contains a vulnerability that allows for remote code execution. This flaw, often associated with the 'PrintNightmare' vulnerability class, enables an attacker to execute arbitrary code with system privileges.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2021-1675 exploited in the wild?** Yes. CVE-2021-1675 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2021-1675?** Critical severity, with a CVSS score of 7.8, published 3 November 2021.

**Which products and versions are affected?** Microsoft Windows 10 up to (excluding) 10.0.10240.18967; Microsoft Windows 10 1607 up to (excluding) 10.0.14393.4467; Microsoft Windows 10 1809 up to (excluding) 10.0.17763.1999; Microsoft Windows 10 1909 up to (excluding) 10.0.18363.1621; and 13 more.

**Is there a fix for CVE-2021-1675?** A patch was published on 2021-06-08: Initial patch released by Microsoft (later updated) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2021-1675 attacked?** It is attacked over the network or with local access, in an operating system.

**Am I affected by CVE-2021-1675?** Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Windows 10 up to (excluding) 10.0.10240.18967
- Microsoft Windows 10 1607 up to (excluding) 10.0.14393.4467
- Microsoft Windows 10 1809 up to (excluding) 10.0.17763.1999
- Microsoft Windows 10 1909 up to (excluding) 10.0.18363.1621
- Microsoft Windows 10 2004 up to (excluding) 10.0.19041.1052
- Microsoft Windows 10 20H2 up to (excluding) 10.0.19042.1052
- Microsoft Windows 10 21H1 up to (excluding) 10.0.19043.1052
- Microsoft Windows 7 SP1
- Microsoft Windows 8.1
- Microsoft Windows RT 8.1
- Microsoft Windows Server 2004 up to (excluding) 10.0.19041.1052
- Microsoft Windows Server 2008 SP2
- Microsoft Windows Server 2008 R2 SP1
- Microsoft Windows Server 2012
- Microsoft Windows Server 2012 R2
- Microsoft Windows Server 2016 up to (excluding) 10.0.14393.4467
- Microsoft Windows Server 2019 up to (excluding) 10.0.17763.1999

## Timeline

- 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2021-11-03: disclosed
- 2021-06-08: patched: Initial patch released by Microsoft (later updated)

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