CVE-2021-1675
Windows Print Spooler Remote Code Execution Vulnerability
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Windows Print Spooler Remote Code Execution Vulnerability
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Microsoft Windows Print Spooler Remote Code Execution Vulnerability.
- Added
- 3 Nov 2021
- Fix due (US federal)
- 17 Nov 2021
- Used by ransomware
- Known
Apply updates per vendor instructions.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: it is being exploited.
Timeline
ID reserved
By microsoft
- 6 months later
· 6 months later
Published
- 5 months later
· 5 months later
Added to CISA KEV
Known exploited, also by ransomware
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 85.3% · top 0.3% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
- Elevation of Privilege
- CWE-noinfo Not enough information
Affected products
Microsoft · Windows 10 Version 1809
- affected 10.0.0 – < 10.0.17763.1999
Microsoft · Windows Server 2019
- affected 10.0.0 – < 10.0.17763.1999
Microsoft · Windows Server 2019 (Server Core installation)
- affected 10.0.0 – < 10.0.17763.1999
Microsoft · Windows 10 Version 1909
- affected 10.0.0 – < 10.0.18363.1621
Microsoft · Windows 10 Version 21H1
- affected 10.0.0 – < 10.0.19043.1052
Microsoft · Windows 10 Version 2004
- affected 10.0.0 – < 10.0.19041.1052
Microsoft · Windows Server version 2004
- affected 10.0.0 – < 10.0.19041.1052
Microsoft · Windows 10 Version 20H2
- affected 10.0.0 – < 10.0.19042.1052
Microsoft · Windows Server version 20H2
- affected 10.0.0 – < 10.0.19042.1052
Microsoft · Windows 10 Version 1507
- affected 10.0.0 – < 10.0.10240.18967
Microsoft · Windows 10 Version 1607
- affected 10.0.0 – < 10.0.14393.4467
Microsoft · Windows Server 2016
- affected 10.0.0 – < 10.0.14393.4467
Microsoft · Windows Server 2016 (Server Core installation)
- affected 10.0.0 – < 10.0.14393.4467
- affected 6.1.0 – < 6.1.7601.25632
Microsoft · Windows 7 Service Pack 1
- affected 6.1.0 – < 6.1.7601.25632
- affected 6.3.0 – < 6.3.9600.20045
- affected 6.3.0 – < 6.3.9600.20044
Microsoft · Windows Server 2008 Service Pack 2
- affected 6.0.0 – < 6.0.6003.21137
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)
- affected 6.0.0 – < 6.0.6003.21137
Microsoft · Windows Server 2008 Service Pack 2
- affected 6.0.0 – < 6.0.6003.21137
Microsoft · Windows Server 2008 R2 Service Pack 1
- affected 6.1.0 – < 6.1.7601.25632
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- affected 6.0.0 – < 6.1.7601.25632
Microsoft · Windows Server 2012
- affected 6.2.0 – < 6.2.9200.23372
Microsoft · Windows Server 2012 (Server Core installation)
- affected 6.2.0 – < 6.2.9200.23372
Microsoft · Windows Server 2012 R2
- affected 6.3.0 – < 6.3.9600.20045
- affected 6.3.0 – < 6.3.9600.20044
Microsoft · Windows Server 2012 R2 (Server Core installation)
- affected 6.3.0 – < 6.3.9600.20045
- affected 6.3.0 – < 6.3.9600.20044
References (6)
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1675 (opens in a new tab)x_refsource_MISCx_transferred
- VU#383432 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- http://packetstormsecurity.com/files/163349/Microsoft-PrintNightmare-Proof-Of-Concept.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/163351/PrintNightmare-Windows-Spooler-Service-Remote-Code-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1675 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-1675)Record last updated .