CVE-2026-45498

Analyzed
Published: 20 May 2026, 13:09
Last modified:19 Jun 2026, 16:12

Vulnerability Summary

Overall Risk (default)
medium
43/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
63.08% CRITICAL
63% probability 0.00%
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 May 2026, 13:09
Published
Vulnerability first disclosed
20 May 2026, 00:00
Added to CISA KEV
Microsoft Defender Denial of Service Vulnerability
03 Jun 2026, 00:00
CISA Remediation Due
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
19 Jun 2026, 16:12
Last Modified
Vulnerability information updated

Description

Microsoft Defender Denial of Service Vulnerability

CVSS Metrics

  • v3.1•MEDIUM•Score: 4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 63.08%• Percentile: 99%

Techniques & Countermeasures

  • CWE-400•Uncontrolled Resource Consumption

    The product does not properly control the allocation and maintenance of a limited resource.

Affected Systems

  • microsoft•defender_antimalware_platform

    ≥ 4.18.26030.3011, < 4.18.26040.7 | < 4.18.26040.7

  • microsoft•microsoft defender antimalware platform

    - | ≥ 4.0.0.0, < 4.18.26040.7

References (2)