Description
Microsoft Defender contains an unspecified vulnerability that allows for denial of service.
Required Action
Fix: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
References
Assess Your Risk
Use the CVSS Calculator to evaluate how this vulnerability affects your specific environment. Consider your network exposure, existing mitigations, and asset criticality.
Frequently Asked Questions
What is CVE-2026-45498?
CVE-2026-45498 (Microsoft Defender Denial of Service Vulnerability) is a vulnerability with a CVSS score of 4.0 (MEDIUM). Microsoft Defender contains an unspecified vulnerability that allows for denial of service.
How do I fix CVE-2026-45498?
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
How severe is CVE-2026-45498?
CVE-2026-45498 has a CVSS score of 4.0, classified as MEDIUM. This vulnerability is in the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been actively exploited in the wild.
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