Is CVE-2026-45498 in the CISA KEV catalog?

Yes. CVE-2026-45498 is on the CISA Known Exploited Vulnerabilities list, added 2026-05-20.

What is the CVSS severity of CVE-2026-45498?

CVE-2026-45498 has a CVSS v3 base score of 4.0 (Low).

What is the EPSS score for CVE-2026-45498?

CVE-2026-45498 has an EPSS score of 63.08% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2026-45498

LOWCISA KEVEPSS 99th pctl

4.0

CVSS v3

NVD

Description

Microsoft Defender Denial of Service Vulnerability

CWE-400Resource Exhaustion

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C

Exploit Intelligence

63.08%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-06-03

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-28.