CVE-2021-1675: Microsoft Windows Print Spooler Remote Code Execution Vulnerability
Vulnerability summary
CVE-2021-1675 is a high (CVSS 9.3) vulnerability in Microsoft Windows. It is known to be exploited: CISA lists it, first on 03-11-2021. It has been used in ransomware campaigns. EPSS estimates a 85.30% chance of exploitation in the next 30 days, higher than 99.7% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 08-06-2021PublishedVulnerability first disclosed.
- 03-11-2021Added to CISA KEVMicrosoft Windows Print Spooler Remote Code Execution Vulnerability
- 17-11-2021CISA remediation dueApply updates per vendor instructions.
- 12-08-2026Last modifiedVulnerability information updated.
Description
Windows Print Spooler Remote Code Execution Vulnerability
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
85.30%
Chance of exploitation in the next 30 days
Percentile
100%
Versus all other CVEs
30-day change
-0.83 pp
From 86.13% on 19-09-2026
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 03-11-2021
- Federal due date
- 17-11-2021
CISA required action
Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2021-1675
Public exploits
2 foundExploit Reference (packetstormsecurity.com)
Maturity: unknown
Print Spooler Remote DLL Injection
exploit/windows/dcerpc/cve_2021_1675_printnightmare
Maturity: poc
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Microsoft35 products
- windows_10_1507< 10.0.10240.18967
- windows_10_1607< 10.0.14393.4467
- windows_10_1809< 10.0.17763.1999
- windows_10_1909< 10.0.18363.1621
- windows_10_2004< 10.0.19041.1052
1 vendor · 35 products
References
6 links
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1675X Refsource MISCPatchVendor Advisory- packetstormsecurity.com/files/163349/Microsoft-PrintNightmare-Proof-Of-Concept.htmlX Refsource MISCThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.htmlX Refsource MISCExploitThird Party AdvisoryVDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1675Government ResourceUS Government Resource