Secure Boot Certificates Expire in June 2026: What It Means for Your Organization

Microsoft has announced that Secure Boot certificates will expire in June 2026, impacting devices that rely on UEFI Secure Boot for trusted startup. This change is part of Microsoft’s ongoing effort to strengthen security and prevent compromised boot loaders from running. While this update is critical for security, it introduces potential risks and operational disruptions if not addressed proactively.

Key Risks and Potential Disruptions

• Device Boot Failures: Systems running older OS versions signed with soon-to-be-revoked certificates may fail to start after firmware updates.
• Operational Downtime: Unprepared organizations could face widespread device outages, impacting productivity and business continuity.
• Compatibility Issues: Legacy hardware and software may not support updated certificates, requiring additional planning and testing.
• Security Exposure: Delaying updates increases vulnerability to boot-level malware and exploits targeting outdated certificates.

High-Level Remediation Strategy
While detailed steps vary by environment, organizations should begin planning now. Here’s what to focus on:

• Inventory Assessment: Identify all devices using Secure Boot and verify their firmware and OS versions.
• Upgrade Planning: Ensure operating systems and firmware are updated to versions signed with valid certificates before June 2026.
• Testing & Validation: Establish a controlled testing process to confirm devices boot successfully after updates.
• Communication & Scheduling: Plan phased rollouts and communicate changes to minimize disruption.

Why Act Now?
The June 2026 deadline may seem distant, but procurement cycles, testing, and change management require significant lead time. Proactive planning ensures security compliance and avoids costly downtime.

Microsoft has published full details, timelines, and version requirements here:
Secure Boot Certificate updates: Guidance for IT professionals and organizations - Microsoft Support

For organizations needing assistance with review, planning, or upgrades, our team can help assess your environment and ensure readiness for the upcoming certificate changes. Please reach out to our industry leading experts at service@helient.com for assistance.