CVE ID
CVE-2026-45498
Vulnerability Name
Microsoft Defender Denial of Service Vulnerability
- Project: Microsoft
- Product: Defender
Date
- Date Added: 2026-05-20
- Due Date: 2026-06-03
Description
Microsoft Defender contains an unspecified vulnerability that allows for denial of service.
Known To Be Used in Ransomware Campaigns?
Unknown
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.
Additional Notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-45498 ; https://nvd.nist.gov/vuln/detail/CVE-2026-45498
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