What’s Vulnerable › Vulnerabilities

CVE-2023-23389: Microsoft Defender Elevation of Privilege Vulnerability

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-14 · updated 2026-06-17
• Weakness: CWE-367

Description

Microsoft Defender Elevation of Privilege Vulnerability

Affected products

• Microsoft Malware Protection Engine: 1.1.20000.2
• Microsoft Malware Protection Engine: from 1.1.0.0 before 1.1.20000.2 — fixed in 1.1.20000.2

How to fix

Upgrade to a fixed version: Microsoft Malware Protection Engine 1.1.20000.2. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23389
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23389

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