The June 2026 Windows security update is now available

🚨 The Signal: Windows security updates are available, including a fix for a BitLocker bypass vulnerability (CVE-2026-45585). These updates also expand secure boot certificate deployment, enhancing device trust.

The Impact

All Windows users are affected by critical security vulnerabilities, requiring immediate patching to mitigate exploitation risk.

  • Security Teams: Must ensure timely deployment to prevent BitLocker bypass.
  • IT Administrators: Responsible for deploying updates across all Windows devices.
  • End Users: May experience reboots during the patching process.
  • Organisations: Risk of data compromise if BitLocker bypass is exploited.

The Action

  1. Initiate deployment of the June 2026 Windows security updates via existing patch management solutions.
  2. Verify successful installation of KB5095051, KB5094126, KB5093998, KB5094127, or KB5094123 relevant to your Windows versions.
  3. Confirm the BitLocker security feature bypass (CVE-2026-45585) is mitigated post-update.
  4. Monitor device update status to ensure high confidence device targeting for Secure Boot certificates is progressing.
  5. Review patch compliance reports to ensure all supported Windows devices are updated.

Domain: Other · Impact: high · Workload: Other · Essential Eight: Patch Operating Systems · ISM: ISM-1407, ISM-1501, ISM-1621, ISM-1622, ISM-1623, ISM-1654, ISM-1655, ISM-1694, ISM-1695, ISM-1696, ISM-1701, ISM-1702, ISM-1877, ISM-1889, ISM-1902