CVE-2021-34527 - Vulnerability Details

Frequency

occurrences

First Seen

March 11, 2026

Last Seen

June 17, 2026

CVE-2021-34527 is a vulnerability tracked across 2 threat clusters and 4 intelligence report mentions on ThreatCluster. First observed March 11, 2026; most recent activity June 17, 2026.

Related Threat Clusters

Microsoft March 2026 Patch Tuesday Addresses 79 Vulnerabilities, Including Zero-Days
On March 10, 2026, Microsoft released its Patch Tuesday updates, fixing 79 vulnerabilities, including two zero-day flaws. The updates address critical vulnerabilities across various products, with one zero-day actively…

51 articles · Updated March 10, 2026
Critical Windows Print Spooler Vulnerability CVE-2021-34527 Exploited
CVE-2021-34527, known as 'PrintNightmare', is a critical remote code execution vulnerability affecting the Windows Print Spooler service. Initially thought to be related to CVE-2021-1675, it was identified on July 1,…

2 articles · Updated June 17, 2026

Recent Intelligence Reports

Kb5005010 Restricting Installation Of New Printer Drivers After Applying The July 6 2021 Updates 31b91c02 05bc 4ada A7ea 183b129578a7 — support.microsoft.com · June 17, 2026
Clarified Guidance For Cve 2021 34527 Windows Print Spooler Vulnerability — msrc-blog.microsoft.com · June 17, 2026
Rapid7 Analysis: CVE-2021-34527 "PrintNightmare" — Rapid7 · June 17, 2026
March 2026 Patch Tuesday: Critical Microsoft CVEs & Fixes — Absolute · March 11, 2026

Related Entities

Malware Phishing Ransomware Zero-day Exploit CVE-2017-0144 CVE-2021-1675 CVE-2021-34481 CVE-2021-36934 CVE-2022-30190 T1003 - OS Credential Dumping T1021 - Remote Services T1059.001 - PowerShell

CVE-2021-34527 - Vulnerability Details

Entity Not Found

Related Threat Clusters

Recent Intelligence Reports

Related Entities

CVSS v3.1 Breakdown