CVE-2021-1675
Confirmed PUBLISHEDWindows Print Spooler Remote Code Execution Vulnerability
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
Windows Print Spooler Remote Code Execution Vulnerability
- CVE Published
- Jun 08, 2021
- Exploitation Reported
- Nov 03, 2021
- CVSS
- 7.8 High
- EPSS
- —
Affected Versions
28 version rows · page 2 of 2
| Vendor | Product | Version | Status |
|---|---|---|---|
| Microsoft |
Windows Server 2012 R2
|
6.3.0 to < 6.3.9600.20044 |
Affected |
| Microsoft |
Windows Server 2012 R2 (Server Core installation)
|
6.3.0 to < 6.3.9600.20045 |
Affected |
| Microsoft |
Windows Server 2012 R2 (Server Core installation)
|
6.3.0 to < 6.3.9600.20044 |
Affected |
CVE References
- VU#383432 kb.cert.org · Third-Party Advisory https://www.kb.cert.org/vuls/id/383432
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1675 portal.msrc.microsoft.com · CVE Record https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CV...
- packetstormsecurity.com/files/163349/Microsoft-PrintNightmare-Proof-... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/163349/Microsoft-PrintNightmare-...
- packetstormsecurity.com/files/163351/PrintNightmare-Windows-Spooler-... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/163351/PrintNightmare-Windows-Sp...
- packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Inject... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2021-11-03 00:00 UTC |
Scanner Artifacts
Nuclei and Metasploit references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/dcerpc/cve_2021_1675_printnightmare.rb | Apr 28, 2025 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
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
Exploitation Status
Exploited in the wild
Recorded 2021-11-03 00:00:00 UTC · CISA
Used in malware
Recorded 2021-11-03 00:00:00 UTC · CISA
Proof of concept available
Recorded 2021-06-29 14:24:30 UTC · GitHub
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/dcerpc/cve_2021_1675_printnightmare.rb | Apr 28, 2025 |
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2024-02-12 20:54:51 UTC · 1 stars
github · Created 2022-02-22 03:32:34 UTC · 2 stars
github · Created 2022-01-30 04:47:44 UTC · 5 stars
PrintNightmare Local Privilege Escalation
github · Created 2021-10-05 19:24:23 UTC · 1 stars
Working PowerShell POC
github · Created 2021-09-01 11:25:04 UTC · 148 stars
PrintNightMare LPE提权漏洞的CS 反射加载插件。开箱即用、通过内存加载、混淆加载的驱动名称来ByPass Defender/EDR。
github · Created 2021-07-22 10:49:30 UTC · 3 stars
see https://github.com/cube0x0/CVE-2021-1675
github · Created 2021-07-18 15:00:27 UTC · 0 stars
github · Created 2021-07-12 08:18:40 UTC · 0 stars
CVE-2021-1675 / CVE-2021-34527 - PrintNightmare Python, C# and PowerShell Exploits Implementations (LPE & RCE)
github · Created 2021-07-08 16:18:52 UTC · 2 stars
github · Created 2021-07-04 09:50:39 UTC · 5 stars
Youtube : https://youtu.be/Zr0KjYDSFKQ
github · Created 2021-07-02 16:44:24 UTC · 9 stars
github · Created 2021-07-02 16:12:15 UTC · 2 stars
github · Created 2021-07-02 06:14:29 UTC · 3 stars
github · Created 2021-07-02 01:45:00 UTC · 10 stars
Vulnerability Scanner for CVE-2021-1675/PrintNightmare
github · Created 2021-07-01 23:45:58 UTC · 1050 stars
Pure PowerShell implementation of CVE-2021-1675 Print Spooler Local Privilege Escalation (PrintNightmare)
github · Created 2021-07-01 19:50:46 UTC · 0 stars
Fix without disabling Print Spooler
github · Created 2021-07-01 13:58:01 UTC · 23 stars
github · Created 2021-07-01 12:24:19 UTC · 1 stars
github · Created 2021-07-01 09:47:13 UTC · 333 stars
Local Privilege Escalation Edition for CVE-2021-1675/CVE-2021-34527
github · Created 2021-07-01 09:00:31 UTC · 59 stars
PrintNightmare , Local Privilege Escalation of CVE-2021-1675 or CVE-2021-34527
github · Created 2021-06-30 18:32:17 UTC · 216 stars
CVE-2021-1675 Detection Info
github · Created 2021-06-29 17:24:14 UTC · 1881 stars
C# and Impacket implementation of PrintNightmare CVE-2021-1675/CVE-2021-34527
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
15:02 UTC about 1 year ago15:02 UTC · about 1 year ago
Metasploit module available
Exploit module available
-
00:00 UTC over 4 years ago00:00 UTC · over 4 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
00:00 UTC over 4 years ago00:00 UTC · over 4 years ago
First public exploitation report
Exploit observed in malware
-
14:24 UTC about 5 years ago14:24 UTC · about 5 years ago
Public PoC available
Public proof-of-concept code published
-
22:46 UTC about 5 years ago22:46 UTC · about 5 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC over 5 years ago00:00 UTC · over 5 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2021-1675
{
"cve_id": "CVE-2021-1675",
"title": "Windows Print Spooler Remote Code Execution Vulnerability",
"affected_vendor": "Microsoft",
"affected_product": "Windows 10 Version 1809, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 1909, Windows 10 Version 21H1, Windows 10 Version 2004, Windows Server version 2004, Windows 10 Version 20H2, Windows Server version 20H2, Windows 10 Version 1507, Windows 10 Version 1607, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows 7, Windows 7 Service Pack 1, Windows 8.1, Windows Server 2008 Service Pack 2, Windows Server 2008 Service Pack 2 (Server Core installation), Windows Server 2008 Service Pack 2, Windows Server 2008 R2 Service Pack 1, Windows Server 2008 R2 Service Pack 1 (Server Core installation), Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 7.8,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}