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High8.0Microsoft Server

High [CVE-2023-35388] Microsoft Exchange Server Remote Code Execution Vulnerability

This high-severity Microsoft Server advisory covers CVE-2023-35388 affecting Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 12, Microsoft Exchange Server 2019 Cumulative Update 13.

CVE-2023-35388 Published Aug 8, 2023Updated by vendor Aug 10, 2026
Affected products & platforms
Microsoft ServerExchange Server
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Summary

Microsoft Exchange Server Remote Code Execution Vulnerability

Affected products named by the advisory: Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 12; Microsoft Exchange Server 2019 Cumulative Update 13.

Affected versions
  • Microsoft Exchange Server 2016 Cumulative Update 23 15.01.0 before 15.01.2507.032
  • Microsoft Exchange Server 2019 Cumulative Update 12 15.02.0 before 15.02.1118.037
  • Microsoft Exchange Server 2019 Cumulative Update 13 15.02.0 before 15.02.1258.025

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions
  • 15.01.2507.032
  • 15.02.1118.037
  • 15.02.1258.025

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 15.01.2507.032, 15.02.1118.037, 15.02.1258.025. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

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