CVE-2026-33825

Name: CVE-2026-33825
Creator: NVD / NIST
Published: 2026-04-14T18:17:35.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 6.75%

Last modified Jun 17, 2026

CVE-2026-33825 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.. CISA has confirmed active exploitation in the wild. EPSS estimates a 6.75% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

6.75%

93.1th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 6, 2026.

Weakness Enumeration

CWE-1220

Affected Software

Vendor	Product	Versions
Microsoft	Defender Antimalware Platform	< 4.18.26030.3011

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33825Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-33825US Government Resource
https://www.huntress.com/blog/nightmare-eclipse-intrusionThird Party Advisory

Timeline

Published: Apr 14, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-33825?

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

How severe is CVE-2026-33825?

CVE-2026-33825 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 6.75% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2026-33825?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-33825?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST