Microsoft · Defender
CVE-2026-33825
Microsoft Defender Elevation of Privilege Vulnerability
What it is
Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.
CISA: Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Deadline for US federal agencies: May 6, 2026
More exploited flaws from Microsoft
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| May 20, 2026 | Link Following | Defender | High 7.8 | 8.2% |
| May 20, 2026 | Denial of Service | Defender | Medium 4.0 | 63% |
| Dec 13, 2022 | SmartScreen Security Feature Bypass | Defender | Medium 5.4 | 76% |
| Nov 3, 2021 | Remote Code Execution | Defender | High 7.8 | 40% |
| Oct 13, 2026 | Command Injection | Windows | High 8.8 | 9.8% |
| Sep 25, 2026 | Code Injection | SharePoint | High 8.8 | 8.2% |
| Sep 8, 2026 | Link Following | Windows | High 7.8 | 0.4% |
| Sep 8, 2026 | Heap-Based Buffer Overflow | Windows | High 7.8 | 0.4% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.