CVE-2021-34527
PrintNightmare: Remote Code Execution in Windows Print Spooler service
⚡ KEV — Known Exploited
CVSS 8.8 (High)
EPSS 0.9620 (1th pct)
Technical Description
PrintNightmare: Remote Code Execution in Windows Print Spooler service.
Why this matters to your organisation:
CISA has confirmed active exploitation in the wild (KEV catalogue entry). The Exploit Prediction Scoring System (EPSS) estimates a 96.2% probability of exploitation within 30 days. The affected service is internet-facing, increasing exposure. This is a critical service for the organisation.
CISA has confirmed active exploitation in the wild (KEV catalogue entry). The Exploit Prediction Scoring System (EPSS) estimates a 96.2% probability of exploitation within 30 days. The affected service is internet-facing, increasing exposure. This is a critical service for the organisation.
Potential Impact
A vulnerability in windows_print_spooler rated High (CVSS 8.8). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalogue, indicating it has been actively exploited in the wild.
✅ Recommended Next Action
Review CVE-2021-34527 and confirm whether windows_print_spooler is in use.
Confidence: Not Applicable
The organisation does not use this product.
CVE Details
| Product | microsoft windows_print_spooler |
| Version Range | <= 10.0 → ∞ |
| Installed | Unknown |
| Match Type | Product Not Used |
| CVSS | 8.8 |
| KEV | YES |
| EPSS | 0.962 |
| Source |
NVD · July 2, 2021 View reference ↗ |
Score Breakdown
⚡ KEV+40
🌐 Exposure+20
⭐ Importance+15
📈 EPSS+14.4
🔢 CVSS+8.8
⚠ Uncertainty-10
Total88