Vulnerability in Microsoft Defender Antimalware Platform

CVE-2026-33825

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

EPSS: 0.071 (91.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: 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.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

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.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-33825?
CVE-2026-33825 is a high-severity vulnerability in Microsoft Defender Antimalware Platform, classified under CWE-1220. CVSS score: 7.8/10. Published 2026-04-14.
How severe is CVE-2026-33825?
High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2026-33825 known to be exploited?
Yes. CVE-2026-33825 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-04-22), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.