CVE-2026-33825

Microsoft Defender Elevation of Privilege Vulnerability

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

Affected

Microsoft · Microsoft Defender Antimalware Platform

CVSS v3.1 MICROSOFT

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

EPSS

0.40% chance of exploitation in the next 30 days, 33rd percentile

CISA KEV

added 2026-04-22, used in ransomware campaigns

Published

2026-04-14

Updated

2026-10-15

Proof-of-concept exploits (4)

• Joe1sn/CVE-2026-338254★ · 2026-05-02
• kaleth4/CVE-2026-338250★ · 2026-04-22
• 0xBlackash/CVE-2026-338259★ · 2026-05-20
• kaleth4/UnBlueHammer0★ · 2026-06-19

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33825
• https://www.huntress.com/blog/nightmare-eclipse-intrusion

References

• CVE Record
• NVD entry

Related

• CVE-2022-22965
• CVE-2023-21768
• CVE-2026-40369
• CVE-2014-6271
• CVE-2019-7711
• CVE-2021-44228