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CVE-2026-33825

HighPublished

Microsoft Defender Elevation of Privilege Vulnerability

Published: Apr 14, 2026
Updated: Aug 14, 2026
Assigning CNA: microsoft
Evidence observed: Apr 22, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

6.7%

Low · next 30 days

Percentile: 93.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.

Sources

CVE-2026-33825PoC
CVE-2026-33825
CVE-2026-33825Research
Technical analysis of CVE-2026-33825 (BlueHammer), a local privilege escalation vulnerability in Microsoft Defender, including exploitation flow, affected versions, and remediation guidance.
CVE-2026-33825PoC
Proof-of-concept exploit for CVE-2026-33825, demonstrating the vulnerability and providing a self-use implementation.

Responsible use

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