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Description of the security update for Microsoft Exchange Server 2019 CU15: September 8, 2026 (KB5121609)

🗓️ 08 Sep 2026 14:00:00Reported by MicrosoftType 
mskb
 mskb
🔗 support.microsoft.com👁 3 Views

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08 Sep 2026 14:00Current
CVSS 3.19.3
SSVC
3