CVE-2026-41091

HIGH CISA KEV EPSS 94.3%
Published May 20, 20261mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published May 20, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago
KEV Listed May 20, 2026 1mo ago
KEV Due Jun 3, 2026 26d overdue

Description

Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

CISA Known Exploited Overdue 26d
Added
May 20, 2026
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.

EPSS Exploit Probability
94.3% percentile
Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available

Weaknesses 1

CWE-59

Affected Products 1

VendorProductVersionRange
microsoftmalware_protection_engine*≥1.1.26030.3008  –  <1.1.26040.8

References 2

  • msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41091
    Vendor Advisory
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41091
    Third Party AdvisoryUS Government Resource

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.