CVE Watch—

CVE-2026-41091

Microsoft Defender Link Following Vulnerability

CVSS

—

No CVSS

EPSS

0.4%

p37

KEV

YES

May 20, 2026

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

0.4%EPSS · 30 days8.2%

2026-09-172026-10-15

KEV catalog record

Product

Microsoft / Defender

Vulnerability

Microsoft Defender Link Following Vulnerability

Added to KEV

May 20, 2026

Remediate by

Jun 3, 2026

Known ransomware use

Summary 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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