CVE-2021-1675

Microsoft Windows 10 Version 1809, Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation)

Published 8 Jun 2021 · updated 12 Aug 2026 · Analyzed

7.8 High · CVSS 3.1, microsoft.com

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, with a remediation deadline of 17 Nov 2021 for US federal agencies. It has been used in ransomware campaigns.

Required action: Apply updates per vendor instructions.

Description

Windows Print Spooler Remote Code Execution Vulnerability

References

packetstormsecurity.com/files/163349/Microsoft-PrintNightmare-Proof-Of-Concept.html · Third Party Advisory, VDB Entry
packetstormsecurity.com/files/163351/PrintNightmare-Windows-Spooler-Service-Remote-Code-Execution.html · Third Party Advisory, VDB Entry
packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.html · Exploit, Third Party Advisory, VDB Entry
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1675 · Patch, Vendor Advisory
www.kb.cert.org/vuls/id/383432 · Third Party Advisory, US Government Resource
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1675 · US Government Resource