CVE-2026-45498
Microsoft Defender Denial of Service Vulnerability
Microsoft Defender Denial of Service Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Defender Denial of Service Vulnerability
Microsoft Defender Denial of Service Vulnerability
- Record
CVE-2026-45498- CVSS 3.1
- 4.0 Medium
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 - Weakness
- CWE-400
- Updated
- 2026-11-02
EUVDEUVD-2026-31102
Microsoft Defender Denial of Service Vulnerability
- Record
EUVD-2026-31102- CVSS 3.1
- 4.0 Medium
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-8gp3-pghr-6wxp
Microsoft Defender Denial of Service Vulnerability
Microsoft Defender Denial of Service Vulnerability
- Record
GHSA-8gp3-pghr-6wxp- CVSS 3.1
- 4.0 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-400
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Defender Denial of Service Vulnerability
Microsoft Defender contains an unspecified vulnerability that allows for denial of service.
- Record
CVE-2026-45498- Updated
- 2026-11-02
NVD
Microsoft Defender Denial of Service Vulnerability
- Record
CVE-2026-45498- CVSS 3.1
- 4.0 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | salihuahmad105-creator/Vulnerability-scanner | 2026-07-02 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-45498 is a medium vulnerability (CVSS 4.0) in Microsoft Defender, published May 20, 2026. CISA lists it as known to be exploited, since May 20, 2026. EUVD reports exploitation since May 20, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 63.1%, the 99th percentile. No source names a fixed version.