A report on November 3, 2026, from Ars Technica indicates that a UEFI-level bootkit has successfully infected Windows computer systems despite these devices having all the latest security patches installed.
This incident raises questions regarding the boot verification mechanism and Microsoft's responsibility in ensuring certificate supply chain security, as Secure Boot is specifically designed to prevent malware from tampering with hardware initialization.
However, comprehensive technical details regarding the specific bootkit variant, its exact exploitation vector, and an official response from Microsoft were not fully documented in the initial source report.