CVE-2026-45498

Microsoft Defender Denial of Service Vulnerability

Microsoft Defender contains an unspecified vulnerability that allows for denial of service. Vendor/Product: Microsoft Defender. Added to CISA KEV 2026-05-20; 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.

Category: Vulnerability, Known Exploited

Reference: NVD CVE-2026-45498