Microsoft Defender
CVE-2026-45498 — Microsoft Defender Denial of Service Vulnerability
Executive Summary
None
Overview
7.5
CVSS HIGH
Low
MS Severity
Exploited
MS Exploit Status
Exploitation Detected
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
Low
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 3.5
EPSS Score
0.63076
probability of exploitation in the next 30 days
0.99129 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
1 affected product
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Defender Antimalware Platform | Release Notes (Security Update) |
Low | Denial of Service | Maybe |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
Release Notes |
Security Update | Maybe |
Exploits & PoC
1 public PoCUnverified third-party code
Public proof-of-concept repositories aggregated from PoC-in-GitHub. They are not reviewed and may be incomplete, non-functional, or malicious — inspect the code before running anything.
| Repository | Stars | Published | Description |
|---|---|---|---|
| salihuahmad105-creator/Vulnerability-scanner | 0 | 2026-07-02 | DESIGN AND IMPLEMENTATION OF A VULNERABILITY SCANNER FOR CVE-2026-45498 IN MICROSOFT DEFENDER |
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
None
References
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