Microsoft Defender Insufficient Granularity of Access Control 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

3.82 %

Predictive Probability

Percentile Rank

88.1 th

Documented as more likely to be exploited than 88.1% of known CVEs.

Detection Date

Apr 22, 2026

Remediation Due

May 06, 2026

CISA Catalog Active

Threat Analysis

Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate 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/vulnerability/CVE-2026-33825

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2026-33825