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CVE-2026-44803

Windows Graphics Component Remote Code Execution Vulnerability

Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
Excel Powerpoint Windows 10 1607 and 26 more
CVE-2026-44812

Windows Graphics Component Remote Code Execution Vulnerability

Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
Excel Powerpoint Windows 10 1607 and 26 more
CVE-2026-45585

Windows BitLocker Security Feature Bypass Vulnerability

Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as &quot;YellowKey&quot;. The proof of concept for this vulnerability has been made public violating coordinated vulnerability best practices. We are issuing this CVE to provide mitigation guidance that can be implemented to protect against this vulnerability until the security update is made available. Mitigation FAQs Should I leverage the temporary mitigation? Microsoft recommends that you consider implementing these mitigations if you are concerned your devices and data are at risk of being compromised or stolen. For example, if your organization’s employees take their work devices home or on business travel. What impact to service availability/management could be caused by implementing the mitigations? Implementing these mitigations will not impact service availability or management operations. Do customers need to revert the changes made to mitigate the vulnerability once the security update to protect against this vulnerability is available? No. The security update will maintain the mitigation's behavior once the security update is installed. I am using TPM+PIN, am I at risk of this vulnerability being exploited No, if you are using TPM+PIN the vulnerability is not exploitable.

CVSS 3.1 · 6.8 Medium EPSS 1.9% KEV · Not listed
Vendors
Microsoft
Products
Windows 11 24h2 Windows 11 24h2 Windows 11 25h2 and 5 more
CVE-2026-21530

Windows Rich Text Edit Elevation of Privilege Vulnerability

Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Office 2016 Office 2019 and 32 more
CVE-2026-41088

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
Windows 10 21h2 Windows 10 21h2 Windows 10 22h2 and 16 more
CVE-2026-40399

Windows TCP/IP Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
Windows 10 1607 Windows 10 1809 Windows 10 21h2 and 22 more