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CVE-2026-41091Microsoft Defender Elevation of Privilege Vulnerability
Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally.
7.8 HIGHEPSS 8.20%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 7.8 | HIGH | 3.1microsoft (CNA) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 7.8 | HIGH | 3.1microsoft (CNA) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
CISA required action
⚡ Known exploited · remediation due Jun 3, 2026
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Details
- CVE ID
- CVE-2026-41091
- Status
- Analyzed
- Assigner (CNA)
- microsoft
- Published
- May 20, 2026
- Last modified
- 2026-08-10 15:13 UTC
- Weaknesses
- CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Affected Products
As published by the CNA in the CVE record.
MicrosoftMicrosoft Malware Protection Engine1 version range
- 1.1.0.0 before 1.1.26040.8