CVE-2026-33825
Microsoft Defender Elevation of Privilege Vulnerability
- High 7.8
- Exploited: added to CISA KEV 22 Apr 2026
- Used in ransomware campaigns
Description
Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.
Key facts
- Published
- 14 Apr 2026
- Last changed
- 15 Oct 2026
- Assigned by
- microsoft
- KEV added
- 22 Apr 2026
- KEV fix due
- 6 May 2026
- Used in ransomware
- Yes, according to CISA
- EPSS
- 6.866% likely to be exploited in the next 30 days, higher than 94.149% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 7.8CVSS 3.1, Highfrom the CNA (microsoft)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
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.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Defender Antimalware Platform |
|
Timeline
- 14 Apr 2026 Published
- 22 Apr 2026 Added to the CISA KEV catalogue