KB5087420: Windows 11 バージョン 23H2 のセキュリティ更新 (2026 年 5 月)

バージョン 1.4

May 18, 2026, 10:04 AM

CVSS metrics ("Cvssv4 score" set to 7.3)
CVSS metrics ("Cvssv4 threat vector" set to "CVSS:4.0/E:P")
CVSS metrics ("Cvssv4 vector" set to "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N")
CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:POC/RL:OF/RC:C")
CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:P/RL:O/RC:C")
Exploit attributes ("Exploit available" set to "True")
Exploit attributes ("Exploitability ease" changed from "No known exploits are available" to "Exploits are available")