Microsoft Windows Print Spooler Remote Code Execution Vulnerability

HIGH 7.8EXPLOITED (CISA KEV)CVE-2021-1675 · Published 08/06/2021 · updated 12/08/2026

Microsoft Windows Print Spooler Remote Code Execution Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 03/11/2021. Patch affected systems as an emergency. It is known to be used in ransomware campaigns.

Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

Description

Windows Print Spooler Remote Code Execution Vulnerability

References

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

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