CVE-2026-41091

Microsoft Defender Link Following Vulnerability

Microsoft — Defender

Added to KEV catalog: 20 May 2026
Federal remediation due date: 3 June 2026
Weakness classification (CWE): CWE-59

CISA Description

Microsoft Defender contains a link following vulnerability that allows an authorized attacker to elevate privileges locally.

Required 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.

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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