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Update Windows PrintNightmare, Print Spooler

ID: be1e4e95-e25a-5f8a-8666-3e189a8c32fc

STIX ID: report--be1e4e95-e25a-5f8a-8666-3e189a8c32fc

Feed Name: Arctic Wolf Blog

Threat Score
75/100

Date Published: 2021-08-16

Date Updated: 2026-04-26

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### Executive Summary This report summarizes a series of high-severity Remote Code Execution vulnerabilities in the Windows Print Spooler (including PrintNightmare/CVE-2021-34527 and several related CVEs), describes their discovery and patch history, notes that some have been exploited by ransomware groups in the wild, and recommends applying the latest patches immediately.

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