KEV Entry

CVE-2021-34527

Known Exploited Vulnerability Entry CISA

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Entry Details
Confirmed Exploited

CVE-2021-34527

2021-11-03 01:00 CET

Timestamps

2021-11-03

2021-11-03

Scope

Microsoft Windows Print Spooler Remote Code Execution Vulnerability | Affected: Microsoft / Windows | Description: 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: Apply updates per vendor instructions. | Due date: 2022-05-03 | Known ransomware campaign use (KEV): Known | Notes (KEV): Reference CISA's ED 21-04 (https://www.cisa.gov/news-events/directives/ed-21-04-mitigate-windows-print-spooler-service-vulnerability) for further guidance and requirements. Note: The due date for addressing this vulnerability aligns with the requirements outlined in ED 21-04. https://nvd.nist.gov/vuln/detail/CVE-2021-34527

References
  • {'id': 'CVE-2021-34527', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-34527'}

8a446985-c0d0-4865-bc72-eb5a9045d475

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-10-02 08:10 CEST

2026-10-02 08:10 CEST

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-269"
  ],
  "date_added": "2021-11-03",
  "due_date": "2022-05-03",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Known",
  "product": "Windows",
  "vendorProject": "Microsoft",
  "vulnerabilityName": "Microsoft Windows Print Spooler Remote Code Execution Vulnerability"
}
 -
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