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Description of the security update for Office 2016: May 12, 2026 (KB5002866)

🗓️ 12 May 2026 14:00:00Reported by MicrosoftType 
mskb
 mskb
🔗 support.microsoft.com👁 9 Views

Office 2016 security update KB5002866 fixes remote code execution CVEs 2026-40358 and 2026-40363 in installer based installations.

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12 May 2026 14:00Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.18.4
EPSS0.00383
SSVC
9