CVE-2026-33825Microsoft Defender Elevation of Privilege Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Defender Antimalware Platform. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Apr 22, 2026; federal agencies had to remediate by May 6, 2026, and it is known to be used in ransomware. Treat that date as your deadline.
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Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.
- CVSS
- 7.8 HIGH (v3.1, CNA)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
- Weakness (CWE)
- CWE-1220
- Known exploited
- Added to CISA KEV Apr 22, 2026; federal remediation due May 6, 2026; known ransomware useApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 0.40% (percentile 33)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Microsoft Defender Antimalware Platform microsoft:defender_antimalware_platform (from the name) | from 4.0.0.0 before 4.18.26030.3011 | CNA record |
microsoft defender_antimalware_platform microsoft:defender_antimalware_platform | before 4.18.26030.3011 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33825vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-33825us-government-resource
- https://www.huntress.com/blog/nightmare-eclipse-intrusionthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.