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CVE-2021-34481— Windows Print Spooler Remote Code Execution Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 1507
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Windows Print Spooler Components是美国微软（Microsoft）公司的一个打印后台处理程序组件。 microsoft Windows Print Spooler Components存在缓冲区错误漏洞。以下产品和版本受到影响：Windows Versions Under Investigation

CVSS 8.8 · High EPSS 47.72% · P99

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 25

VendorProduct Version RangeStatus
Microsoft Windows 10 Version 1507 10.0.10240.0< 10.0.10240.19022 affected
Microsoft Windows 10 Version 1607 10.0.14393.0< 10.0.14393.4583 affected
Microsoft Windows 10 Version 1809 10.0.17763.0< 10.0.17763.2114 affected
10.0.0< 10.0.17763.2114 affected
Microsoft Windows 10 Version 1909 10.0.0< 10.0.18363.1734 affected
Microsoft Windows 10 Version 2004 10.0.0< 10.0.19041.1165 affected
Microsoft Windows 10 Version 20H2 10.0.0< 10.0.19042.1165 affected
Microsoft Windows 10 Version 21H1 10.0.0< 10.0.19043.1165 affected
Microsoft Windows 7 6.1.0< 6.1.7601.25685 affected
Microsoft Windows 7 Service Pack 1 6.1.0< 6.1.7601.25685 affected
Microsoft Windows 8.1 6.3.0< 6.3.9600.20094 affected
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0< 6.1.7601.25685 affected
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0< 6.1.7601.25685 affected
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0< 6.0.6003.21192 affected
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0< 6.0.6003.21192 affected
Microsoft Windows Server 2012 6.2.9200.0< 6.2.9200.23435 affected
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0< 6.2.9200.23435 affected
Microsoft Windows Server 2012 R2 6.3.9600.0< 6.3.9600.20094 affected
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0< 6.3.9600.20094 affected
Microsoft Windows Server 2016 10.0.14393.0< 10.0.14393.4583 affected
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0< 10.0.14393.4583 affected
Microsoft Windows Server 2019 10.0.17763.0< 10.0.17763.2114 affected
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0< 10.0.17763.2114 affected
Microsoft Windows Server version 2004 10.0.0< 10.0.19041.1165 affected
Microsoft Windows Server version 20H2 10.0.0< 10.0.19042.1165 affected
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I. Basic Information for CVE-2021-34481

Vulnerability Information
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Vulnerability Title
Windows Print Spooler Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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. UPDATE August 10, 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. This security update changes the Point and Print default behavior; please see KB5005652.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Print Spooler Components 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Print Spooler Components是美国微软（Microsoft）公司的一个打印后台处理程序组件。 microsoft Windows Print Spooler Components存在缓冲区错误漏洞。以下产品和版本受到影响：Windows Versions Under Investigation
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 10 Version 1507 10.0.10240.0 ~ 10.0.10240.19022 -
Microsoft Windows 10 Version 1607 10.0.14393.0 ~ 10.0.14393.4583 -
Microsoft Windows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.2114 -
Microsoft Windows 10 Version 1809 10.0.0 ~ 10.0.17763.2114 -
Microsoft Windows 10 Version 1909 10.0.0 ~ 10.0.18363.1734 -
Microsoft Windows 10 Version 2004 10.0.0 ~ 10.0.19041.1165 -
Microsoft Windows 10 Version 20H2 10.0.0 ~ 10.0.19042.1165 -
Microsoft Windows 10 Version 21H1 10.0.0 ~ 10.0.19043.1165 -
Microsoft Windows 7 6.1.0 ~ 6.1.7601.25685 -
Microsoft Windows 7 Service Pack 1 6.1.0 ~ 6.1.7601.25685 -
Microsoft Windows 8.1 6.3.0 ~ 6.3.9600.20094 -
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 ~ 6.1.7601.25685 -
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 ~ 6.1.7601.25685 -
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0 ~ 6.0.6003.21192 -
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 ~ 6.0.6003.21192 -
Microsoft Windows Server 2012 6.2.9200.0 ~ 6.2.9200.23435 -
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 ~ 6.2.9200.23435 -
Microsoft Windows Server 2012 R2 6.3.9600.0 ~ 6.3.9600.20094 -
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 ~ 6.3.9600.20094 -
Microsoft Windows Server 2016 10.0.14393.0 ~ 10.0.14393.4583 -
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 ~ 10.0.14393.4583 -
Microsoft Windows Server 2019 10.0.17763.0 ~ 10.0.17763.2114 -
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 ~ 10.0.17763.2114 -
Microsoft Windows Server version 2004 10.0.0 ~ 10.0.19041.1165 -
Microsoft Windows Server version 20H2 10.0.0 ~ 10.0.19042.1165 -

II. Public POCs for CVE-2021-34481

# POC Description Source Link Shenlong Link
1 Check patch for CVE-2021-34481 https://github.com/vpn28/CVE-2021-34481 POC Details
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III. Intelligence Information for CVE-2021-34481

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Vendor Advisories for CVE-2021-34481 (2)

Same Patch Batch · Microsoft · 2021-07-16 · 27 CVEs total

CVE-2021-34458 9.9 CRITICAL Windows Kernel Remote Code Execution Vulnerability
CVE-2021-34442 8.8 HIGH Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-34450 8.5 HIGH Windows Hyper-V Remote Code Execution Vulnerability
CVE-2021-34446 8.0 HIGH Windows HTML Platforms Security Feature Bypass Vulnerability
CVE-2021-34464 7.8 HIGH Microsoft Defender Remote Code Execution Vulnerability
CVE-2021-34438 7.8 HIGH Windows Font Driver Host Remote Code Execution Vulnerability
CVE-2021-34439 7.8 HIGH Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2021-34441 7.8 HIGH Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2021-34445 7.8 HIGH Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
CVE-2021-34452 7.8 HIGH Microsoft Word Remote Code Execution Vulnerability
CVE-2021-34455 7.8 HIGH Windows File History Service Elevation of Privilege Vulnerability
CVE-2021-34456 7.8 HIGH Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
CVE-2021-34459 7.8 HIGH Windows AppContainer Elevation Of Privilege Vulnerability
CVE-2021-34460 7.8 HIGH Windows Storage Spaces Controller Elevation of Privilege Vulnerability
CVE-2021-34461 7.8 HIGH Windows Container Isolation FS Filter Driver Elevation of Privilege Vulnerability
CVE-2021-34467 7.1 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2021-34449 7.0 HIGH Win32k Elevation of Privilege Vulnerability
CVE-2021-34462 7.0 HIGH Windows AppX Deployment Extensions Elevation of Privilege Vulnerability
CVE-2021-34448 6.8 MEDIUM Scripting Engine Memory Corruption Vulnerability
CVE-2021-34447 6.8 MEDIUM Windows MSHTML Platform Remote Code Execution Vulnerability

Showing top 20 of 27 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1507
Same vendor: Microsoft

V. Comments for CVE-2021-34481

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