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TI-2023-09232 Aliases CVE-2023-23389GHSA-fpmq-pvjx-5562

Microsoft Defender Elevation of Privilege Vulnerability

Priority LOW 28CWE-367Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Privilege escalation
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

Microsoft Defender Elevation of Privilege Vulnerability

Why it matters now

EPSS 0.00259 17th percentileScored 2026-11-07
Fix Fixed Microsoft Malware Protection Engine (Microsoft): 1.1.20000.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Malware Protection Engine1.1.0.0 to before 1.1.20000.21.1.20000.2Patch availableCNA
  • Microsoft Malware Protection Engine VendorMicrosoft Affected 1.1.0.0 to before 1.1.20000.2 Fixed in 1.1.20000.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:malware_protection_engine:1.1.20000.2:*:*:*:*:*:*:*1.1.20000.2VulnerableMicrosoft
  • cpe:2.3:a:microsoft:malware_protection_engine:1.1.20000.2:*:*:*:*:*:*:* Versions 1.1.20000.2 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft Malware Protection Engine (Microsoft) Fixed in 1.1.20000.2

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
—
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Malware Protection EngineFixed 1.1.20000.2 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-23389
  2. 2026-10-03 Alias added: GHSA-fpmq-pvjx-5562

References

Patch 1

  • TI-2026-29727 Microsoft Defender Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 7.8
  • TI-2017-06074 Out-of-bounds write in Microsoft Malware Protection Engine KEVCVSS 3.1HIGH 7.8
  • TI-2017-00265 Memory corruption in Microsoft Malware Protection Engine CVSS 3.0HIGH 7.8
  • TI-2026-48742 Microsoft Defender Elevation of Privilege Vulnerability CVSS 3.1HIGH 7.8
  • TI-2026-37344 Microsoft Defender Elevation of Privilege Vulnerability CVSS 3.1HIGH 7.8
  • TI-2017-06072 Memory corruption in Microsoft Malware Protection Engine CVSS 3.0HIGH 7.8
See all 30 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences