June 23, 2026—KB5095093 (OS Builds 26200.8737 and 26100.8737) Preview

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May 12, 2026—KB5089549 (OS Builds 26200.8457 and 26100.8457)

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May 12, 2026—KB5087539(OS Build 26100.32860)

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June 9, 2026—KB5094125 (OS Build 26100.32995)

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KB5094141: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: June 9, 2026

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Improper Validation of Certificate Expiration

Overview Affected versions of this package are vulnerable to Improper Validation of Certificate Expiration in the GetTokenExchangeToken function. An attacker can maintain access to revoked or invalidated tokens by reusing JWTs that should no longer be valid, potentially bypassing session...

May 26, 2026—KB5089573 (OS Builds 26200.8524 and 26100.8524) Preview

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May 12, 2026—KB5087545 (OS Build 20348.5139)

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May 12, 2026—KB5087544 (OS Builds 19045.7291 and 19044.7291)

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May 12, 2026—KB5087541 (OS Build 25398.2330)

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March 10, 2026—Hotpatch KB5078737 (OS Build 20348.4830)

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KB5088064: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: May 12, 2026

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April 19, 2026—KB5091573 (OS Build 17763.8647) Out-of-band

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April 19, 2026—KB5091575 (OS Build 20348.5024) Out-of-band

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April 14, 2026—KB5082063(OS Build 26100.32690)

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April 14, 2026—KB5082052 (OS Build 22631.6936)

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March 10, 2026—KB5079473 (OS Builds 26200.8037 and 26100.8037)

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March 10, 2026—KB5078766 (OS Build 20348.4893)

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March 10, 2026—KB5078885 (OS Builds 19045.7058 and 19044.7058)

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March 10, 2026—KB5078752 (OS Build 17763.8511)

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