CVE-2026-58638
Windows Boot Loader Security Feature Bypass vulnerability
Microsoft·Windows Boot Loader Security Feature Bypass
MSRC advisory July 14, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-58638
- Affected products
- Windows Boot Loader Security Feature Bypass · Microsoft Windows Boot Loader Security Feature Bypass · Microsoft
What happened
Missing cryptographic step in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.
What it means for your business
Windows Boot Loader Security Feature Bypass vulnerability (CVE-2026-58638) was added to Microsoft’s security update guidance. Missing cryptographic step in Windows Boot Loader allows an authorized attacker to bypass a security feature locally. PremierePC tracks MSRC advisories for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
Sources
Related briefs
Windows NTFS Information Disclosure vulnerability
Windows NTFS Information Disclosure vulnerability (CVE-2026-50341) was added to Microsoft’s security update guidance. Acknowledgement Updated PremierePC tracks MSRC advisories for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
Azure Resource Manager Elevation of Privilege vulnerability
Azure Resource Manager Elevation of Privilege vulnerability (CVE-2026-24304) was added to Microsoft’s security update guidance. Informational Change. CVE ID stays the same. PremierePC tracks MSRC advisories for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
Windows DHCP Client Remote Code Execution vulnerability
Windows DHCP Client Remote Code Execution vulnerability (CVE-2026-54128) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. PremierePC tracks MSRC advisories for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
Microsoft Office Remote Code Execution vulnerability
Microsoft Office Remote Code Execution vulnerability (CVE-2026-55129) was added to Microsoft’s security update guidance. Acknowledgement Updated PremierePC tracks MSRC advisories for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
Need help patching?
PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.