Secure Boot is a UEFI firmware feature that verifies the digital signatures of bootloaders, kernel drivers, and OS components to ensure only trusted code runs at startup.
Secure Boot is a technology platform tracked across 6 threat clusters and 6 intelligence report mentions on ThreatCluster. First observed January 16, 2026; most recent activity July 15, 2026.
Secure Boot is a UEFI firmware feature that verifies the digital signatures of bootloaders, kernel drivers, and OS components to ensure only trusted code runs at startup. By preventing unauthenticated code from executing during boot, it helps guard against bootkits and other boot-level malware, making it a foundational control in cybersecurity; it is commonly used with TPM-based attestation to strengthen boot integrity on modern devices.
On July 14, 2026, Microsoft released the Windows 10 KB5099539 extended security update, addressing a record 570 vulnerabilities, including two actively exploited zero-day flaws. This update is part of the July 2026…
On June 9, 2026, Microsoft released its largest Patch Tuesday update, addressing 206 vulnerabilities, including three zero-day flaws. Among the critical vulnerabilities, 32 were rated as critical, with 28 classified as…
ESET researchers have discovered 11 outdated UEFI shim bootloaders, all version 0.9 or below, that can bypass UEFI Secure Boot protections on systems trusting Microsoft's 2011 certificate. These vulnerabilities allow…
A security researcher, known as Chaotic Eclipse, has publicly released exploit code for a zero-day vulnerability in Windows, dubbed BlueHammer, allowing local privilege escalation to SYSTEM or elevated administrator…
Microsoft has acknowledged issues affecting Windows 11 23H2 devices following the January 13, 2026, security updates. Systems with 'Secure Boot' or System Guard Secure Launch enabled may experience failures to shut down…
Microsoft has issued a warning to Windows 10 users regarding the expiration of Secure Boot certificates in June 2026. Users who do not upgrade or enroll in the Extended Security Updates program may face a degraded…
Secure Boot is a UEFI firmware feature that verifies the digital signatures of bootloaders, kernel drivers, and OS components to ensure only trusted code runs at startup.
The most recent intelligence report mentioning Secure Boot on ThreatCluster is dated July 15, 2026. Activity was first observed January 16, 2026, giving a tracked span from then to July 15, 2026.
Across ThreatCluster reporting, Secure Boot most frequently co-occurs with Malware, Zero-day Exploit, Azure, Microsoft, CVE-2026-20945, among 12 tracked related entities.
The most significant recent cluster is “Microsoft Releases Critical Security Update for Windows 10 Addressing 570 Vulnerabilities” (7 articles · Updated July 14, 2026). Secure Boot appears across 6 threat clusters in total, listed above with sources.
Secure Boot appears in 6 intelligence report mentions across 6 deduplicated threat clusters, aggregated from 17,000+ monitored sources.