7.8
High
CVE-2026-33825 Microsoft Defender Insufficient Granularity of Access Control Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Ransomware campaigns
Known to be used
Weakness
CWE-1220
Description
Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft Defender Antimalware Platform 4.0 | 4.0.0.0 → < 4.18.26030.3011 | 4.18.26030.3011 |