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CVE-2021-34527: Microsoft Windows Print Spooler Remote Code Execution Vulnerability
Microsoft Windows · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2022-05-03federal remediation due date
99.79%EPSS exploit probability (30 days) 100.0th percentile
8.8 HIGHCVSS 3.1
Knownknown ransomware use
124days from NVD publication to KEV
What it is
Microsoft Windows Print Spooler contains an unspecified vulnerability due to the Windows Print Spooler service improperly performing privileged file operations. Successful exploitation allows an attacker to perform remote code execution with SYSTEM privileges. The vulnerability is also known under the moniker of PrintNightmare.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-269 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2021-07-02 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-34527.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.