CVE-2026-45498: listed in the CISA KEV catalog

CVE-2026-45498 · CVSS 4.0 MEDIUM · EPSS 63% · KEV 2026-05-20 · patch available

Microsoft Defender Denial of Service Vulnerability

Is CVE-2026-45498 exploited?

• Listed in the CISA KEV catalog on 2026-05-20.
• Federal remediation due 2026-06-03.
• Past that date by 73 days.
• EPSS puts exploitation in the next 30 days at 63%.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

• Release Notes

What PlainSec published about CVE-2026-45498

PlainSec has not published a story about this CVE.

Primary sources

• NVD record
• CISA KEV catalog

What this record does not say

• No affected package data.

KEV and EPSS are re-checked daily. Record last updated 2026-08-11.