CVE-2026-41091— Microsoft Defender Elevation of Privilege Vulnerability
In-the-Wild Activity Observed github_trending · low cisa_kev · confirmed
Possible ATT&CK Techniques 1AI
T1068 · Exploitation for Privilege EscalationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft Malware Protection Engine | - | affected |
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I. Basic Information for CVE-2026-41091
Vulnerability Information
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Vulnerability Title
Microsoft Defender Elevation of Privilege Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Microsoft Defender 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Defender是美国微软（Microsoft）公司的一款威胁防护软件。 Microsoft Defender存在后置链接漏洞，该漏洞源于文件访问前链接解析不当，可能导致授权攻击者本地提升权限。
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 | Microsoft Malware Protection Engine | - | - |
II. Public POCs for CVE-2026-41091
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Advisory · 1
Same Patch Batch · Microsoft · 2026-05-20 · 4 CVEs total
| CVE-2026-45584 | 8.1 HIGH | Microsoft Defender Remote Code Execution Vulnerability |
| CVE-2026-42834 | 7.8 HIGH | Windows Admin Center in Azure Portal Elevation of Privilege Vulnerability |
| CVE-2026-45498 | 4.0 MEDIUM | Microsoft Defender Denial of Service Vulnerability |
IV. Related Vulnerabilities
Same product: Microsoft Malware Protection Engine
- CVE-2026-45584
Microsoft Defender Remote Code Execution Vulnerability - CVE-2023-33156
Microsoft Defender Elevation of Privilege Vulnerability - CVE-2023-24860
Microsoft Defender Denial of Service Vulnerability - CVE-2023-23389
Microsoft Defender Elevation of Privilege Vulnerability - CVE-2022-37971
Microsoft Windows Defender Elevation of Privilege Vulnerabil
Same vendor: Microsoft
- CVE-2026-42834
Windows Admin Center in Azure Portal Elevation of Privilege - CVE-2026-45584
Microsoft Defender Remote Code Execution Vulnerability - CVE-2026-45498
Microsoft Defender Denial of Service Vulnerability - CVE-2026-45585
Windows BitLocker Security Feature Bypass Vulnerability - CVE-2026-42822
Azure Local Disconnected Operations (ALDO) Elevation of Priv
Same weakness: CWE-59
- CVE-2025-71212
Trend Micro Apex One本地权限提升漏洞 - CVE-2026-44051
Arbitrary file read via attacker-controlled symlink creation - CVE-2026-42834
Windows Admin Center in Azure Portal Elevation of Privilege - CVE-2026-45539
Microsoft APM: Symlinks under `.apm/prompts/` and `.apm/agen - CVE-2026-44471
gitoxide: Symlink prefix-reuse allows worktree escape during
V. Comments for CVE-2026-41091
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