CVE-2026-33825 — Microsoft Defender Insufficient Granularity of Access Control Vulnerability
CVE-2026-33825: Microsoft Defender Insufficient Granularity of Access Control Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Microsoft |
| Product | Defender |
| Date added | 2026-04-22 |
| Due date | 2026-05-06 |
| Ransomware campaign use | Known |
Description
Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33825 ; https://nvd.nist.gov/vuln/detail/CVE-2026-33825
Weakness behind it
CISA records this vulnerability as an instance of CWE-1220. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-33825
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
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