CVE-2026-45498 — Actively Exploited: Defender (Microsoft)
Microsoft Defender contains an unspecified vulnerability that allows for denial of service.
| CVE ID | CVE-2026-45498 |
|---|---|
| Vendor | Microsoft |
| Product | Defender |
| Vulnerability name | Microsoft Defender Denial of Service Vulnerability |
| Date added | 2026-05-20 |
| Remediation due | 2026-06-03 |
| Known ransomware use | Unknown |
| 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. |
| Description | Microsoft Defender contains an unspecified vulnerability that allows for denial of service. |
| Source | CISA Known Exploited Vulnerabilities |
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