Microsoft Exchange Server のセキュリティ更新プログラム (2025 年 12 月)

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バージョン 1.4 Feb 28, 2026, 12:53 AM Logic Changes (added in subscription edition updates) Plugin Feed: 202602280053
バージョン 1.3 Feb 25, 2026, 9:03 AM CVSS metrics ("CVSSv2 score" set to 7.1) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:C") CVSSv2 score source (changed from "CVE-2025-64667" to "CVE-2025-64666") CVSSv2 severity (based on CVE-2025-64666, severity increased from "Medium" to "High") CVSSv3 score source (changed from "CVE-2025-64666" to none) Plugin Feed: 202602250903
バージョン 1.2 Dec 12, 2025, 5:16 PM IAVM reference STIG Severity (set to "I") Plugin Feed: 202512121716
バージョン 1.1 Dec 11, 2025, 12:59 PM New Plugin Feed: 202512111259

* Changelogs are generally available for changes made after Nov 1, 2022