The June Deadline: Microsoft Issues Urgent Secure Boot Certificate Updates
ID: c6184597-9b01-515c-8216-efc68d079c73
STIX ID: report--c6184597-9b01-515c-8216-efc68d079c73
Feed Name: securityonline.info
Microsoft has begun a phased, telemetry-driven rollout of updated UEFI Secure Boot certificates to eligible Windows 11 (24H2/25H2) devices to replace certificates expiring in June 2026; administrators are urged to apply these updates to avoid degraded Secure Boot protections and loss of pre-boot security updates, with manual deployment options available via Registry, WinCS, and GPO.
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