Microsoft Defender Link Following Vulnerability

Technical Severity

CVSS v3.1 Metrics

HIGH

7.8 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation Likelihood

EPSS Prediction

6.55 %

Predictive Probability

Percentile Rank

91.2 th

Documented as more likely to be exploited than 91.2% of known CVEs.

Detection Date

May 20, 2026

Remediation Due

Jun 03, 2026

CISA Catalog Active

Threat Analysis

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

Remediation Directive

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

External Intelligence

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-41091

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2026-41091