Windows Print Spooler Components
CVE-2021-1675 — Windows Print Spooler Remote Code Execution Vulnerability
Executive Summary
None
Overview
7.8
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
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
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.8
EPSS Score
0.84814
probability of exploitation in the next 30 days
0.9969 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
25 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for 32-bit Systems | 5003687 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 for x64-based Systems | 5003687 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1607 for 32-bit Systems | 5003638 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1607 for x64-based Systems | 5003638 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 5003646 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for ARM64-based Systems | 5003646 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for x64-based Systems | 5003646 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1909 for 32-bit Systems | 5003635 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1909 for ARM64-based Systems | 5003635 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1909 for x64-based Systems | 5003635 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 2004 for 32-bit Systems | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 2004 for ARM64-based Systems | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 2004 for x64-based Systems | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 20H2 for 32-bit Systems | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 20H2 for ARM64-based Systems | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 21H1 for 32-bit Systems | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 21H1 for ARM64-based Systems | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 21H1 for x64-based Systems | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 7 for 32-bit Systems Service Pack 1 5003667 (Monthly Rollup) 5003694 (Security Only) Critical Remote Code Execution 5003233 Base: 7.8 Temporal: 6.8 Vector: 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 6.1.7601.25632 Yes None Windows 7 for x64-based Systems Service Pack 1 5003667 (Monthly Rollup) 5003694 (Security Only) Critical Remote Code Execution 5003233 Base: 7.8 Temporal: 6.8 Vector: 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 6.1.7601.25632 Yes None Windows 8.1 for 32-bit systems 5003671 (Monthly Rollup) 5003681 (Security Only) Critical Remote Code Execution 5003209 Base: 7.8 Temporal: 6.8 Vector: 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 6.3.9600.20045 6.3.9600.20044 Yes None Windows 8.1 for x64-based systems 5003671 (Monthly Rollup) 5003681 (Security Only) Critical Remote Code Execution 5003209 Base: 7.8 Temporal: 6.8 Vector: 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 6.3.9600.20045 6.3.9600.20044 Yes None Windows RT 8.1 | 5003671 (Monthly Rollup) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 for 32-bit Systems Service Pack 2 5003661 (Monthly Rollup) 5003695 (Security Only) Critical Remote Code Execution 5003210 Base: 7.8 Temporal: 6.8 Vector: 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 6.0.6003.21137 Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5003661 (Monthly Rollup) 5003695 (Security Only) Critical Remote Code Execution 5003210 Base: 7.8 Temporal: 6.8 Vector: 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 6.0.6003.21137 Yes None Windows Server 2008 for x64-based Systems Service Pack 2 5003661 (Monthly Rollup) 5003695 (Security Only) Critical Remote Code Execution 5003210 Base: 7.8 Temporal: 6.8 Vector: 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 6.0.6003.21137 Yes None Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5003661 (Monthly Rollup) 5003695 (Security Only) Critical Remote Code Execution 5003210 Base: 7.8 Temporal: 6.8 Vector: 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 6.0.6003.21137 Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 5003667 (Monthly Rollup) 5003694 (Security Only) Critical Remote Code Execution 5003233 Base: 7.8 Temporal: 6.8 Vector: 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 6.1.7601.25632 Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5003667 (Monthly Rollup) 5003694 (Security Only) Critical Remote Code Execution 5003233 Base: 7.8 Temporal: 6.8 Vector: 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 6.1.7601.25632 Yes None Windows Server 2012 5003697 (Monthly Rollup) 5003696 (Security Only) Critical Remote Code Execution 5003208 Base: 7.8 Temporal: 6.8 Vector: 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 6.2.9200.23372 Yes None Windows Server 2012 (Server Core installation) 5003697 (Monthly Rollup) 5003696 (Security Only) Critical Remote Code Execution 5003208 Base: 7.8 Temporal: 6.8 Vector: 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 6.2.9200.23372 Yes None Windows Server 2012 R2 5003671 (Monthly Rollup) 5003681 (Security Only) Critical Remote Code Execution 5003209 Base: 7.8 Temporal: 6.8 Vector: 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 6.3.9600.20045 6.3.9600.20044 Yes None Windows Server 2012 R2 (Server Core installation) 5003671 (Monthly Rollup) 5003681 (Security Only) Critical Remote Code Execution 5003209 Base: 7.8 Temporal: 6.8 Vector: 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 6.3.9600.20045 6.3.9600.20044 Yes None Windows Server 2016 | 5003638 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2016 (Server Core installation) | 5003638 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 | 5003646 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 (Server Core installation) | 5003646 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server, version 2004 (Server Core installation) | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server, version 20H2 (Server Core Installation) | 5003637 (Security Update) |
Critical | Remote Code Execution | Yes |
Patches
6 patches
| Article | Type | Restart |
|---|---|---|
5003687 |
Security Update | Yes |
5003638 |
Security Update | Yes |
5003646 |
Security Update | Yes |
5003635 |
Security Update | Yes |
5003637 |
Security Update | Yes |
5003671 |
Monthly Rollup | Yes |
Exploits & PoC
15 public PoCsUnverified third-party code
Public proof-of-concept repositories aggregated from PoC-in-GitHub. They are not reviewed and may be incomplete, non-functional, or malicious — inspect the code before running anything.
| Repository | Stars | Published | Description |
|---|---|---|---|
| cube0x0/CVE-2021-1675 | 1999 | 2021-06-29 | C# and Impacket implementation of PrintNightmare CVE-2021-1675/CVE-2021-34527 |
| calebstewart/CVE-2021-1675 | 1109 | 2021-07-01 | Pure PowerShell implementation of CVE-2021-1675 Print Spooler Local Privilege Escalation (PrintNightmare) |
| hlldz/CVE-2021-1675-LPE | 325 | 2021-07-01 | Local Privilege Escalation Edition for CVE-2021-1675/CVE-2021-34527 |
| LaresLLC/CVE-2021-1675 | 214 | 2021-06-30 | CVE-2021-1675 Detection Info |
| ly4k/PrintNightmare | 213 | 2021-09-26 | Python implementation for PrintNightmare (CVE-2021-1675 / CVE-2021-34527) |
| mstxq17/CVE-2021-1675_RDL_LPE | 145 | 2021-09-01 | 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。 |
| sailay1996/PrintNightmare-LPE | 76 | 2021-07-05 | CVE-2021-1675 (PrintNightmare) |
| evilashz/CVE-2021-1675-LPE-EXP | 56 | 2021-07-01 | PrintNightmare , Local Privilege Escalation of CVE-2021-1675 or CVE-2021-34527 |
| cybersecurityworks553/CVE-2021-1675_PrintNightMare | 23 | 2021-07-01 | |
| JumpsecLabs/PrintNightmare | 19 | 2021-07-07 | Information on the Windows Spooler vulnerability - CVE-2021-1675; CVE 2021 34527 |
| eversinc33/NimNightmare | 18 | 2021-12-05 | CVE-2021-1675 LPE PoC in Nim (PrintNightmare Local Privilege Escalation) |
| k8gege/cve-2021-1675 | 15 | 2021-07-11 | |
| Leonidus0x10/CVE-2021-1675-SCANNER | 9 | 2021-07-02 | Vulnerability Scanner for CVE-2021-1675/PrintNightmare |
| corelight/CVE-2021-1675 | 9 | 2021-07-02 | |
| Wra7h/SharpPN | 9 | 2021-09-26 | C# PrintNightmare (CVE-2021-1675) |
Detection Rules
Detection availableCommunity detection & vulnerability-scanning rules aggregated from Sigma and Nuclei templates. Validate and tune to your environment before deploying.
Sigma rules 14
Antivirus PrinterNightmare CVE-2021-34527 Exploit Detection
critical
CVE-2021-1675 Print Spooler Exploitation Filename Pattern
critical
PrinterNightmare Mimikatz Driver Name
critical
CVE-2021-1675 Print Spooler Exploitation
critical
CVE-2021-1675 Print Spooler Exploitation IPC Access
critical
Potential PrintNightmare Exploitation Attempt
high
Possible CVE-2021-1675 Print Spooler Exploitation
high
Malicious PowerShell Commandlets - PoshModule
high
Malicious PowerShell Commandlets - ScriptBlock
high
Malicious PowerShell Commandlets - ProcessCreation
high
Suspicious Printer Driver Empty Manufacturer
high
Possible PrintNightmare Print Driver Install - CVE-2021-1675
medium
Suspicious Rejected SMB Guest Logon From IP
medium
Windows Spooler Service Suspicious Binary Load
informational
Acknowledgments
Yunhai Zhang of NSFOCUS TIANJI LAB https://www.nsfocus.com.cn/
Piotr Madej of AFINE
Zhipeng Huo (@R3dF09)
References
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