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Description of the security update for Microsoft Exchange Server Subscription Edition RTM: October 14, 2025 (KB5066366)

🗓️ 14 Oct 2025 14:00:00Reported by MicrosoftType 
mskb
 mskb
🔗 support.microsoft.com👁 14 Views

Security update for Exchange Server Subscription Edition RTM fixes privilege and spoofing vulnerabilities and disables certificate export via cmdlet.

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14 Oct 2025 14:00Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.17.8 - 8.8
EPSS0.00172
SSVC
14