CVE-2021-34527

HIGH KEV RANSOMWARE

Windows Print Spooler - Remote Code Execution via Privileged File Operations

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2021-34527 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added November 3, 2021, with confirmed use in ransomware campaigns. EIP tracks 34 public exploits from researchers including byt3bl33d3r, JohnHammond, nemo-wq, including a Metasploit module lib/msf/core/mcp/tools/search_modules.

AI-analyzed exploit summary This repository contains a Python-based scanner for CVE-2021-34527 (PrintNightmare) that checks for vulnerability over MS-PAR and MS-RPRN protocols without exploiting the hosts. It generates a CSV report with results.

Description

<p>A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>UPDATE July 7, 2021: The security update for Windows Server 2012, Windows Server 2016 and Windows 10, Version 1607 have been released. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability.</p> <p>In addition to installing the updates, in order to secure your system, you must confirm that the following registry settings are set to 0 (zero) or are not defined (<strong>Note</strong>: These registry keys do not exist by default, and therefore are already at the secure setting.), also that your Group Policy setting are correct (see FAQ):</p> <ul> <li>HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers\PointAndPrint</li> <li>NoWarningNoElevationOnInstall = 0 (DWORD) or not defined (default setting)</li> <li>UpdatePromptSettings = 0 (DWORD) or not defined (default setting)</li> </ul> <p><strong>Having NoWarningNoElevationOnInstall set to 1 makes your system vulnerable by design.</strong></p> <p>UPDATE July 6, 2021: Microsoft has completed the investigation and has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. If you are unable to install these updates, see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability. See also <a href="https://support.microsoft.com/topic/31b91c02-05bc-4ada-a7ea-183b129578a7">KB5005010: Restricting installation of new printer drivers after applying the July 6, 2021 updates</a>.</p> <p>Note that the security updates released on and after July 6, 2021 contain protections for CVE-2021-1675 and the additional remote code execution exploit in the Windows Print Spooler service known as “PrintNightmare”, documented in CVE-2021-34527.</p>

Exploits (34)

nomisec SCANNER 804 stars
by byt3bl33d3r · poc
https://github.com/byt3bl33d3r/ItWasAllADream

This repository contains a Python-based scanner for CVE-2021-34527 (PrintNightmare) that checks for vulnerability over MS-PAR and MS-RPRN protocols without exploiting the hosts. It generates a CSV report with results.

Classification
Scanner 100%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Windows Print Spooler
Auth required
Prerequisites: Authenticated Active Directory credentials · Network access to target systems
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 304 stars
by JohnHammond · local
https://github.com/JohnHammond/CVE-2021-34527

This repository contains a functional PowerShell script that exploits CVE-2021-34527 (PrintNightmare) to achieve local privilege escalation by adding a new local administrator user or executing a custom DLL as NT AUTHORITY\SYSTEM. The exploit leverages the Windows Print Spooler service to load a malicious driver.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Local access to a vulnerable Windows system · Print Spooler service running
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 165 stars
by nemo-wq · remote-auth
https://github.com/nemo-wq/PrintNightmare-CVE-2021-34527

This repository contains a functional exploit for CVE-2021-34527 (PrintNightmare), which leverages the Windows Print Spooler service to achieve remote code execution (RCE) via crafted RPC calls to add a malicious printer driver. The exploit includes Python and C++ implementations, demonstrating the vulnerability by copying a DLL to a remote system and executing it.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Network access to the target system · Valid credentials for authentication · SMB access to a share hosting the malicious DLL
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 119 stars
by m8sec · remote
https://github.com/m8sec/CVE-2021-34527

This repository contains a functional Python exploit for CVE-2021-34527, leveraging the Print Spooler service to achieve remote code execution via a crafted driver installation. The exploit includes an SMB server for staging payloads and uses DCERPC for communication with the target.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Valid credentials for the target system · Network access to the target's SMB and RPC services
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 22 stars
by hackerhouse-opensource · local
https://github.com/hackerhouse-opensource/cve-2021-34527

This repository contains a functional exploit for CVE-2021-34527, leveraging the AddPrinterDriverEx() API to escalate privileges to SYSTEM by loading a malicious DLL into spoolsv.exe. The exploit includes cleanup mechanisms and is designed for Windows Desktop and Server versions.

Classification
Working Poc 100%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows Desktop 7,8,8.1,10,11 & Server 2008,2012,2016,2019
Auth required
Prerequisites: A valid path to a thread-safe DLL · Weakened Point & Print policy or administrative privileges
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec SUSPICIOUS 5 stars
by CnOxx1 · poc
https://github.com/CnOxx1/CVE-2021-34527-1675

The repository contains only a vague README with no technical details or exploit code, instead using buzzwords and referencing external CVEs without providing any substantive analysis or PoC.

Classification
Suspicious 90%
Attack Type
Other
Complexity
Theoretical
Reliability
Theoretical
Target: Windows Print Spooler
No auth needed
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WRITEUP 3 stars
by Tomparte · poc
https://github.com/Tomparte/PrintNightmare

This repository provides a PowerShell script and documentation for mitigating the PrintNightmare vulnerability (CVE-2021-34527) by applying registry modifications and service configurations. It does not contain exploit code but offers technical guidance on remediation.

Classification
Writeup 90%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Administrative access to modify registry and services
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 3 stars
by dywhoami · infoleak
https://github.com/dywhoami/CVE-2021-34527-Scanner-Based-On-cube0x0-POC

This repository contains a functional exploit for CVE-2021-34527, a vulnerability in the Windows Print Spooler service. The exploit leverages the RpcAddPrinterDriverEx function to achieve remote code execution by manipulating printer driver configurations.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Valid domain credentials · Network access to the target machine
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec SCANNER 2 stars
by 0xirison · poc
https://github.com/0xirison/PrintNightmare-Patcher

This repository contains a Python script that scans for the PrintNightmare vulnerability (CVE-2021-34527) by checking for the presence of security updates, registry settings, and the status of the Print Spooler service. It also attempts to mitigate the vulnerability by disabling the service and updating registry keys.

Classification
Scanner 95%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Administrative privileges on the target Windows system
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 2 stars
by thomas-lauer · poc
https://github.com/thomas-lauer/PrintNightmare

This repository contains PowerShell scripts to exploit CVE-2021-34527 (PrintNightmare) by modifying ACLs on the Windows Print Spooler directory to grant or deny SYSTEM access, enabling privilege escalation or lateral movement. The scripts include functionality to backup, restore, and manipulate permissions on the spooler directory.

Classification
Working Poc 90%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler (CVE-2021-34527)
Auth required
Prerequisites: Local access to a vulnerable Windows system · PowerShell execution privileges
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WRITEUP 2 stars
by rdboboia · poc
https://github.com/rdboboia/disable-RegisterSpoolerRemoteRpcEndPoint

This repository provides a workaround for CVE-2021-34527 (Windows Print Spooler RCE) by disabling the RegisterSpoolerRemoteRpcEndPoint registry entry. It includes detailed instructions for manual mitigation via Group Policy Editor.

Classification
Writeup 90%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler
Auth required
Prerequisites: Administrative privileges on the target system
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec SCANNER 2 stars
by powershellpr0mpt · poc
https://github.com/powershellpr0mpt/PrintNightmare-CVE-2021-34527

The repository contains PowerShell scripts for detecting and remediating registry settings related to CVE-2021-34527 (PrintNightmare). It does not include exploit code but provides detection and mitigation tools.

Classification
Scanner 90%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler
Auth required
Prerequisites: Administrative access to modify registry settings
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 1 stars
by cyb3rpeace · local
https://github.com/cyb3rpeace/CVE-2021-34527

This repository contains a functional PowerShell script that exploits CVE-2021-34527 (PrintNightmare) to achieve local privilege escalation by adding a new local administrator user or executing a custom DLL as NT AUTHORITY\SYSTEM. The exploit leverages the Windows Print Spooler service to load a malicious DLL.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service (spoolsv.exe)
Auth required
Prerequisites: Local access to a vulnerable Windows system · Print Spooler service running
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 1 stars
by Amaranese · poc
https://github.com/Amaranese/CVE-2021-34527

This repository contains a functional PowerShell exploit for CVE-2021-34527 (PrintNightmare), which leverages a vulnerability in the Windows Print Spooler service to achieve local privilege escalation (LPE) by loading a malicious DLL. The exploit includes a custom DLL payload that creates a new local administrator user with a specified password.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service (spoolsv.exe)
Auth required
Prerequisites: Local access to a vulnerable Windows system · Windows Print Spooler service running
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WRITEUP
by AlDawli · poc
https://github.com/AlDawli/CVE-2021-34527-

This repository contains a detailed technical analysis of CVE-2021-34527 (PrintNightmare), including root cause, attack flow, affected systems, mitigation steps, and detection guidance. It does not include exploit code but provides in-depth vulnerability research.

Classification
Writeup 100%
Attack Type
Rce | Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service (spoolsv.exe)
Auth required
Prerequisites: Authenticated access to the target system · SMB or RPC connectivity to the Print Spooler service
devstral-2 · analyzed May 27, 2026 Full analysis →
gitlab SUSPICIOUS
by pgregoire-ci · poc
https://gitlab.com/pgregoire-ci/CVE-2021-34527

This repository does not contain actual exploit code but instead provides a GitLab CI pipeline to build an external exploit (SharpPrintNightmare) and directs users to download the binary from an external source. The README lacks technical details about CVE-2021-34527 and serves as a redirect to another repository.

Classification
Suspicious 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: Windows Print Spooler
No auth needed
Prerequisites: access to GitLab CI artifacts
devstral-2 · analyzed Feb 23, 2026 Full analysis →
nomisec WORKING POC
by AUSK1LL9 · poc
https://github.com/AUSK1LL9/CVE-2021-34527

This repository contains a functional PowerShell script that exploits CVE-2021-34527 (PrintNightmare) to achieve local privilege escalation by adding a new local administrator user or executing a custom DLL as NT AUTHORITY\SYSTEM. The exploit leverages the Windows Print Spooler service to load a malicious driver.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service (multiple versions)
Auth required
Prerequisites: Local access to a vulnerable Windows system · Print Spooler service running
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec SCANNER
by TieuLong21Prosper · poc
https://github.com/TieuLong21Prosper/detect_bruteforce

This repository contains a Python script that detects brute-force attacks by monitoring network traffic for repeated login attempts (e.g., FTP USER/PASS commands) using Scapy. It logs packets to PCAP and CSV files but does not exploit CVE-2021-34527.

Classification
Scanner 90%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Network services (FTP)
No auth needed
Prerequisites: Network access to monitor traffic · Scapy library
MITRE ATT&CK
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by d0rb · poc
https://github.com/d0rb/CVE-2021-34527

This repository contains a functional Python script that sends a crafted SMB payload to exploit CVE-2021-34527 (PrintNightmare). The payload is designed to trigger the vulnerability via SMB port 445.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler
No auth needed
Prerequisites: Network access to target's SMB port (445) · Vulnerable Windows Print Spooler service
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WRITEUP
by syntaxbearror · poc
https://github.com/syntaxbearror/PowerShell-PrintNightmare

This repository provides PowerShell scripts to mitigate CVE-2021-34527 (PrintNightmare) by setting registry keys to restrict printer driver installation and block remote printing. It includes technical details on registry modifications and references external blogs for deeper analysis.

Classification
Writeup 90%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler
Auth required
Prerequisites: Administrative access to modify registry keys
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by Eutectico · poc
https://github.com/Eutectico/Printnightmare

This repository contains PowerShell scripts to mitigate CVE-2021-34527 (PrintNightmare) by disabling the Print Spooler service and modifying ACLs to prevent driver installation. The scripts are functional and directly address the vulnerability by blocking exploit paths.

Classification
Working Poc 90%
Attack Type
Lpe
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Administrator privileges · Access to the target system
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WRITEUP
by WidespreadPandemic · poc
https://github.com/WidespreadPandemic/CVE-2021-34527_ACL_mitigation

This repository provides PowerShell scripts to mitigate CVE-2021-34527 (PrintNightmare) by modifying ACLs to deny write permissions to the printer drivers directory. It includes scripts to apply and rollback the mitigation, along with a detailed explanation of its effectiveness.

Classification
Writeup 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler
Auth required
Prerequisites: Access to modify ACLs on the target system
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec STUB
by glorisonlai · poc
https://github.com/glorisonlai/printnightmare

The repository contains only a minimal README with a CVE reference and no functional exploit code or technical details. It appears to be a placeholder without substantive content.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: Windows Print Spooler
No auth needed
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by geekbrett · poc
https://github.com/geekbrett/CVE-2021-34527-PrintNightmare-Workaround

This PowerShell script mitigates CVE-2021-34527 (PrintNightmare) by disabling the Print Spooler service and blocking remote RPC endpoints. It provides options to temporarily or permanently re-enable the service for printing tasks.

Classification
Working Poc 90%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Administrator privileges
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec STUB
by vinaysudheer · poc
https://github.com/vinaysudheer/Disable-Spooler-Service-PrintNightmare-CVE-2021-34527

This repository contains a simple batch script to disable the Microsoft Print Spooler service as a mitigation for CVE-2021-34527 (PrintNightmare). It does not include an exploit PoC or technical analysis of the vulnerability.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target: Microsoft Windows Print Spooler
Auth required
Prerequisites: Administrative privileges on the target system
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec SUSPICIOUS
by fengjixuchui · poc
https://github.com/fengjixuchui/CVE-2021-34527-1675

The repository contains only a vague README with no technical details or exploit code, and the title suggests a mix of two unrelated CVEs (CVE-2021-1675 and CVE-2021-34527). No actual exploit or analysis is provided.

Classification
Suspicious 90%
Attack Type
Other
Complexity
Theoretical
Reliability
Theoretical
Target: Windows Print Spooler
No auth needed
devstral-2 · analyzed May 22, 2026 Full analysis →
nomisec SCANNER
by DenizSe · poc
https://github.com/DenizSe/CVE-2021-34527

The repository contains PowerShell scripts that scan for the state of the Print Spooler service across domain controllers in an Active Directory environment. It does not exploit CVE-2021-34527 but checks for the service status, which could be used to identify vulnerable systems.

Classification
Scanner 90%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Access to Active Directory environment · Permissions to query domain controllers
devstral-2 · analyzed Feb 18, 2026 Full analysis →
metasploit SCANNER
rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/lib/msf/core/mcp/tools/search_modules.rb

This code is a Metasploit Framework module search tool that queries the module database for exploits, including those related to CVE-2021-34527. It does not contain exploit code but provides a structured way to search for modules.

Classification
Scanner 100%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Metasploit Framework
Auth required
Prerequisites: Access to Metasploit Framework API · Valid authentication credentials
devstral-2 · analyzed May 01, 2026 Full analysis →
metasploit WORKING POC
by Zhiniang Peng, Xuefeng Li, Zhipeng Huo, Piotr Madej, Zhang Yunhai, cube0x0, Spencer McIntyre, Christophe De La Fuente · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/dcerpc/cve_2021_1675_printnightmare.rb

This Metasploit module exploits CVE-2021-34527 (PrintNightmare) by abusing the Print Spooler service to load a malicious DLL via a crafted DCERPC request, achieving remote code execution as NT AUTHORITY\SYSTEM.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Authenticated SMB access · Print Spooler service running
devstral-2 · analyzed Mar 05, 2026 Full analysis →
patchapalooza WORKING POC
by whoami-chmod777 · local
https://github.com/whoami-chmod777/CVE-2021-1675-CVE-2021-34527

This repository contains a functional PowerShell exploit for CVE-2021-1675 (PrintNightmare), which allows local privilege escalation by adding a new local administrator user via a malicious printer driver. The exploit includes a custom DLL payload and leverages the Windows Print Spooler service to execute arbitrary code as NT AUTHORITY\SYSTEM.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service (CVE-2021-1675)
Auth required
Prerequisites: Local access to a vulnerable Windows system · PowerShell execution privileges
devstral-2 · analyzed Feb 23, 2026 Full analysis →
patchapalooza WORKING POC
by d0nkeyk0ng787 · remote
https://github.com/d0nkeyk0ng787/PrintNightmare-POC

This repository contains a functional exploit for CVE-2021-34527 (PrintNightmare), which leverages the Windows Print Spooler service to achieve remote code execution by loading a malicious DLL. The exploit uses the AddPrinterDriverExW API to trigger the vulnerability and requires a SMB server to host the payload.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Windows Print Spooler service (affected versions include Windows 10 1809 and others)
No auth needed
Prerequisites: A malicious DLL generated via msfvenom · SMB server to host the DLL · Metasploit listener for reverse shell · Correct driver path on the target system
devstral-2 · analyzed Feb 23, 2026 Full analysis →
patchapalooza WORKING POC
by ly4k · remote-auth
https://github.com/ly4k/PrintNightmare

This repository contains a functional Python exploit for CVE-2021-34527 (PrintNightmare), leveraging Impacket to achieve remote code execution via the Windows Print Spooler service. The exploit supports multiple modes, including DLL injection, vulnerability checking, and driver enumeration.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service (multiple versions)
Auth required
Prerequisites: valid credentials or Kerberos authentication · network access to the target's SMB and RPRN services
devstral-2 · analyzed Feb 23, 2026 Full analysis →
patchapalooza WORKING POC
by cube0x0 · remote-auth
https://github.com/cube0x0/CVE-2021-1675

This repository contains a functional Python exploit for CVE-2021-34527 (PrintNightmare), which leverages the Windows Print Spooler service to achieve remote code execution via a malicious DLL. The exploit uses the MS-RPRN protocol to manipulate printer driver configurations and execute arbitrary code.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Windows Print Spooler Service
Auth required
Prerequisites: Valid credentials or NTLM hashes · Network access to the target's SMB service · A share hosting the malicious DLL
devstral-2 · analyzed Feb 23, 2026 Full analysis →

Scores

CVSS v3 8.8
EPSS 0.9424
EPSS Percentile 99.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable no
Technical Impact total

Details

CISA KEV 2021-11-03
VulnCheck KEV 2021-07-02
InTheWild.io 2021-07-16
ENISA EUVD EUVD-2021-21181
Ransomware Use Confirmed
Status published
Products (19)
microsoft/windows_10_1507 < 10.0.10240.18969
microsoft/windows_10_1607 < 10.0.14393.4470
microsoft/windows_10_1809 < 10.0.17763.2029
microsoft/windows_10_20h2 < 10.0.19042.1083
microsoft/windows_10_21h2 < 10.0.19044.1415
microsoft/windows_10_22h2 < 10.0.19045.2251
microsoft/windows_11_21h2 < 10.0.22000.318
microsoft/windows_11_22h2 < 10.0.22621.674
microsoft/windows_7
microsoft/windows_8.1
... and 9 more
Published Jul 02, 2021
KEV Added Nov 03, 2021
Tracked Since Feb 18, 2026