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CVE-2023-38151: Microsoft Host Integration Server 2020 Remote Code Execution Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-14 · updated 2026-06-17
• Weakness: CWE-908

Description

Microsoft Host Integration Server 2020 Remote Code Execution Vulnerability

Affected products

• Microsoft Host Integration Server: 2020
• Microsoft Ole Db Provider: 7.0
• Microsoft Host Integration Server 2020: from 7.0 before KB5032921 — fixed in KB5032921

How to fix

Upgrade to a fixed version: Microsoft Host Integration Server 2020 KB5032921. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38151
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38151

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