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Description of the security update for Microsoft Exchange Server 2019 CU15: December 9, 2025 (KB5071875)

🗓️ 09 Dec 2025 08:00:00Reported by MicrosoftType 
mskb
 mskb
🔗 support.microsoft.com👁 38 Views

Exchange Server 2019 CU15 security update fixes two CVEs and a Skype for Business OWA integration issue.

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09 Dec 2025 08:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
EPSS0.00049
SSVC
38