CVE ID
CVE-2026-41091
Vulnerability Name
Microsoft Defender Link Following Vulnerability
- Project: Microsoft
- Product: Defender
Date
- Date Added: 2026-05-20
- Due Date: 2026-06-03
Description
Microsoft Defender contains a link following vulnerability that allows an authorized attacker to elevate privileges locally.
Known To Be Used in Ransomware Campaigns?
Unknown
Action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Additional Notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-41091 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41091
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