High [CVE-2026-45583] Microsoft Exchange Server Remote Code Execution Vulnerability
This high-severity Microsoft Server advisory covers CVE-2026-45583 affecting Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2019 Cumulative Update 15.
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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 14; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server Subscription Edition RTM.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- KB5103215 (build 15.01.2507.071)
- KB5103214 (build 15.02.1544.043)
- KB5103213 (build 15.02.1748.048)
- KB5103212 (build 15.02.2562.045)
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Install the applicable security update for your platform: KB5103215, KB5103214, KB5103213, KB5103212 (see the Microsoft Update Catalog).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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