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CVE-2026-21517— Windows App for Mac Installer Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Windows App for Mac
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Windows是美国微软（Microsoft）公司的一套个人设备使用的操作系统。 Microsoft Windows存在后置链接漏洞。攻击者利用该漏洞可以提升权限。

CVSS 4.7 · Medium EPSS 0.38% · P29

Possible ATT&CK Techniques 1 AI

T1564.004 · NTFS File Attributes

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Windows App for Mac 11.0.0< 11.3.2 affected
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I. Basic Information for CVE-2026-21517

Vulnerability Information
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Vulnerability Title
Windows App for Mac Installer Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper link resolution before file access ('link following') in Windows App for Mac allows an authorized attacker to elevate privileges locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows是美国微软（Microsoft）公司的一套个人设备使用的操作系统。 Microsoft Windows存在后置链接漏洞。攻击者利用该漏洞可以提升权限。
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 App for Mac 11.0.0 ~ 11.3.2 -

II. Public POCs for CVE-2026-21517

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III. Intelligence Information for CVE-2026-21517

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Same Patch Batch · Microsoft · 2026-02-10 · 54 CVEs total

CVE-2026-21531 9.8 CRITICAL Azure SDK for Python Remote Code Execution Vulnerability
CVE-2026-21518 8.8 HIGH GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability
CVE-2026-21255 8.8 HIGH Windows Hyper-V Security Feature Bypass Vulnerability
CVE-2026-21256 8.8 HIGH GitHub Copilot and Visual Studio Remote Code Execution Vulnerability
CVE-2026-21516 8.8 HIGH GitHub Copilot for Jetbrains Remote Code Execution Vulnerability
CVE-2026-21513 8.8 HIGH MSHTML Framework Security Feature Bypass Vulnerability
CVE-2026-21510 8.8 HIGH Windows Shell Security Feature Bypass Vulnerability
CVE-2026-21537 8.8 HIGH Microsoft Defender for Endpoint Linux Extension Remote Code Execution Vulnerability
CVE-2026-21228 8.1 HIGH Azure Local Remote Code Execution Vulnerability
CVE-2026-21257 8.0 HIGH GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability
CVE-2026-21523 8.0 HIGH GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability
CVE-2026-21229 8.0 HIGH Power BI Remote Code Execution Vulnerability
CVE-2026-21240 7.8 HIGH Windows HTTP.sys Elevation of Privilege Vulnerability
CVE-2026-21514 7.8 HIGH Microsoft Word Security Feature Bypass Vulnerability
CVE-2026-20841 7.8 HIGH Windows Notepad App Remote Code Execution Vulnerability
CVE-2026-21533 7.8 HIGH Windows Remote Desktop Services Elevation of Privilege Vulnerability
CVE-2026-21236 7.8 HIGH Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
CVE-2026-21246 7.8 HIGH Windows Graphics Component Elevation of Privilege Vulnerability
CVE-2026-21259 7.8 HIGH Microsoft Excel Elevation of Privilege Vulnerability
CVE-2026-21519 7.8 HIGH Desktop Window Manager Elevation of Privilege Vulnerability

Showing top 20 of 54 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows App for Mac
Same vendor: Microsoft
Same weakness: CWE-59

V. Comments for CVE-2026-21517

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