CVE-2021-1675
KEVRansomware UseMicrosoft Windows Print Spooler Remote Code Execution Vulnerability
Description
Microsoft Windows Print Spooler contains an unspecified vulnerability that allows for remote code execution.
Windows Print Spooler Remote Code Execution Vulnerability
CVSS 3.1 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HPublishedJun 8, 2021
Last modifiedAug 12, 2026
Added to KEVNov 3, 2021
Remediation dueNov 17, 2021
References
- packetstormsecurity.com/files/163349/Microsoft-PrintNightmare-Proof-Of-Concept.htmlThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/163351/PrintNightmare-Windows-Spooler-Service-Remote-Code-Execution.htmlThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.htmlExploitThird Party Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1675PatchVendor Advisory
- kb.cert.org/vuls/id/383432Third Party AdvisoryUS Government Resource
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1675US Government Resource
0 recent articles mention this CVE
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Risk assessment · Critical
Actively exploited and used by ransomware crews. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1805 days
- Ransomware
- Used in known ransomware campaigns
- CVSS
- 7.8 HIGH
- EPSS (30-day exploit probability)
- 85.3% · top 1% of all CVEs
- Weakness
- NVD-CWE-Other
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
- 4.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.