Security CISA KEV CVE-2026-45498 CVE-2026-45498 CISA KEV
Microsoft Defender Denial of Service Vulnerability
Severity unknown CVSS unknown Check the vendor advisory for fixed versions
CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.
CISA catalog record
Microsoft Defender contains an unspecified vulnerability that allows for denial of service.
Product Defender
Added to KEV 20 May 2026
Federal remediation due 3 Jun 2026
Known ransomware use Not reported Page history
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23 Oct 2026 · 09:33:49 UTC
Source coverage: cisa-kev Incomplete → Current 23 Oct 2026 · 08:31:50 UTC
Source coverage: cisa-kev Current → Incomplete Explore global source statements, affected packages and advisory history for CVE-2026-45498 . The catalog has a separate collection scope from Microsoft release records.
More advisories, affected versions and source history Overview Affected History Connections
Related advisories and sources Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-45498 · CVE overview and exploitation status
cve-program · CVE-2026-45498
Related changes Linked by CVE identifier