secure boot

Microsoft disclosed CVE-2026-45654 on June 9, 2026, as an Important Windows Secure Boot security feature bypass affecting Windows 11 24H2, 25H2, 26H1, and Windows Server 2025, with official fixes delivered through June Patch Tuesday cumulative updates. The flaw is not being described as...

Microsoft released Windows 10 KB5094127 on June 9, 2026, as the June Patch Tuesday cumulative update for Windows 10 22H2 systems covered by Extended Security Updates, raising eligible PCs to build 19045.7417 and adding File Explorer search fixes, Secure Boot certificate status reporting, and...

Microsoft published CVE-2026-48578 on June 9, 2026, describing an Important-rated Windows Secure Boot security feature bypass that can let a highly privileged local attacker defeat Secure Boot protections across supported Windows client and server releases. The short version is simple enough for...

CVE-2026-48576 is a Microsoft-tracked Secure Boot security feature bypass vulnerability disclosed through the MSRC Security Update Guide in June 2026, affecting the pre-operating-system trust chain that Windows relies on to decide whether early boot code should be allowed to run. The important...

Microsoft disclosed CVE-2026-48575 on June 9, 2026, as an Important Windows Secure Boot security feature bypass affecting supported Windows client and server releases, with official fixes issued through security updates and no public disclosure or exploitation reported at publication time. The...

Microsoft published CVE-2026-48573 on June 9, 2026, describing an Important-severity Windows Secure Boot security feature bypass that can be exploited locally by an authorized attacker and is addressed through June security updates for supported Windows client and server releases. The advisory...

Microsoft disclosed CVE-2026-48568 on June 9, 2026, as an Important-rated Windows Secure Boot security feature bypass that can be exploited locally by an authorized attacker and is addressed through June Patch Tuesday updates across supported Windows client and server releases. The advisory is...

Microsoft listed CVE-2026-8863 on June 9, 2026, as a UEFI Secure Boot security feature bypass vulnerability in its Security Update Guide, with the public entry emphasizing confidence in the vulnerability’s existence rather than publishing deep technical exploitation details. That distinction...

Microsoft disclosed CVE-2026-45588 on June 9, 2026, as an Important-rated Windows Secure Boot security feature bypass affecting supported Windows client and server releases, with official fixes published for Windows 10, Windows 11, Windows Server 2012 through 2025, and related Server Core...

Microsoft released Windows 10 KB5094127 on June 9, 2026, as a Patch Tuesday cumulative security update for Extended Security Updates devices, moving Windows 10 22H2 to build 19045.7417 and Windows 10 21H2/LTSC 2021 to build 19044.7417. The headline fixes are modest on paper: better File Explorer...

Microsoft released Windows 11 update KB5094126 on June 9, 2026, for Windows 11 versions 25H2 and 24H2, moving supported PCs to OS builds 26200.8655 and 26100.8655 with security fixes, Secure Boot certificate work, virtualization repairs, and features from May’s preview updates. The headline is...

Microsoft released Windows 10 KB5094127 on June 9, 2026, for Windows 10 ESU and supported LTSC 2021 systems, raising version 22H2 to build 19045.7417 and version 21H2/LTSC 2021 to build 19044.7417 with File Explorer search fixes, Secure Boot reporting changes, and a BitLocker recovery-key...

Microsoft released KB5094126 on June 9, 2026, as the monthly cumulative security update for Windows 11 versions 25H2 and 24H2, moving systems to OS builds 26200.8655 and 26100.8655 while bundling servicing-stack changes, Secure Boot certificate targeting, and a fix for recent...

Microsoft released Windows 11 KB5094126 on June 9, 2026, as the June Patch Tuesday security update for Windows 11 versions 25H2 and 24H2, raising systems to builds 26200.8655 and 26100.8655 while beginning a wider rollout of performance, audio, camera, and Secure Boot changes. The update is...

Microsoft released KB5094149 on June 9, 2026, as a Safe OS Dynamic Update for Windows 11 versions 24H2 and 25H2, alongside renewed guidance that Secure Boot certificates used across most Windows devices are beginning to expire in June 2026. That makes this otherwise obscure servicing package...

Microsoft released KB5095185 on June 9, 2026, as a Safe OS Dynamic Update for Windows 11 version 26H1, refreshing the recovery and setup environment while again warning that long-lived Windows Secure Boot certificates begin expiring this month. The update itself is small in presentation but...

Microsoft released Windows 11 cumulative update KB5094126 on June 9, 2026, for Windows 11 versions 24H2 and 25H2, raising them to OS builds 26100.8655 and 26200.8655, while Windows 11 version 23H2 received KB5093998 and build 22631.7219. On paper, this is another Patch Tuesday bundle: security...

Microsoft is expected to begin rolling out the June 2026 security update for Windows 11 on Tuesday, June 9, 2026, bringing a batch of quality-of-life features to versions 24H2 and 25H2 through the same cumulative servicing channel. The headline is not one giant redesign, but a cluster of smaller...

Microsoft has clarified in a June 2026 Secure Boot administrator briefing that Windows PCs will not suddenly stop booting after the Microsoft Corporation KEK CA 2011 certificate expires on June 24, 2026, but unmanaged or unpatched devices may lose access to future revocation protections. That...

Microsoft told administrators on June 4, 2026, that Windows devices will not suddenly fail to boot when the original Secure Boot KEK certificate expires on June 24, but systems missing the 2023 certificates will lose access to future revocation updates and become progressively weaker against...