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18,545 advisories
Each date says whether the vendor published or updated the bulletin. A vendor bulletin describes products that may be affected. It does not prove that the vulnerable product or version is installed in your environment.
Microsoft Security Response CenterCVE-2026-50415
HighCVSS 5.3
Windows Media Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows Media allows an unauthorized attacker to disclose information over a network.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50413
HighCVSS 8.8
Windows Runtime Elevation of Privilege Vulnerability
Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.
Affected productsWindows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems
Fixed versions10.0.26100.33158, 10.0.26200.8875, 10.0.26100.8875, 10.0.28000.2525
Vendor guidance
Install KB5099536. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50412
HighCVSS 7.8
Windows NTFS Elevation of Privilege Vulnerability
Stack-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535. Install KB5099445. Install KB5099444.
Microsoft Security Response CenterCVE-2026-50410
HighCVSS 7.0
Windows Runtime Elevation of Privilege Vulnerability
Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50409
HighCVSS 5.5
Windows Overlay Filter Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows Overlay Filter allows an authorized attacker to disclose information locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535.
Microsoft Security Response CenterCVE-2026-50408
HighCVSS 5.5
Microsoft Excel Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Affected productsOffice Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.0.10417.20175, https://aka.ms/OfficeSecurityReleases, 16.111.26071215, 16.0.5561.1001
Vendor guidance
Click to Run Release Notes Install KB5002884. Install KB5002886.
Microsoft Security Response CenterCVE-2026-50406
HighCVSS 7.0
Windows Backup Engine Elevation of Privilege Vulnerability
Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
Affected productsWindows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for x64-based Systems
Fixed versions10.0.19044.7548, 10.0.19045.7548, 10.0.26200.8875, 10.0.26100.8875
Vendor guidance
Install KB5099539. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50405
HighCVSS 7.8
Windows Filtering Platform Elevation of Privilege Vulnerability
Insufficient granularity of access control in Windows Filtering Platform (WFP) allows an authorized attacker to elevate privileges locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535. Install KB5099445. Install KB5099444.
Microsoft Security Response CenterCVE-2026-50404
HighCVSS 7.0
Windows Media Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Media allows an authorized attacker to elevate privileges locally.
Affected productsWindows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems
Fixed versions10.0.26200.8875, 10.0.26100.8875, 10.0.28000.2525
Vendor guidance
Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50403
HighCVSS 7.0
Windows Runtime Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.
Affected productsWindows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems
Fixed versions10.0.26100.33158, 10.0.26200.8875, 10.0.26100.8875, 10.0.28000.2525
Vendor guidance
Install KB5099536. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50402
HighCVSS 7.8
NTFS Elevation of Privilege Vulnerability
Incorrect conversion between numeric types in Windows NTFS allows an authorized attacker to elevate privileges locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535. Install KB5099445. Install KB5099444.
Microsoft Security Response CenterCVE-2026-50401
HighCVSS 5.5
Windows Cloud Files Mini Filter Driver Information Disclosure Vulnerability
Out-of-bounds read in Windows Cloud Files Mini Filter Driver allows an authorized attacker to disclose information locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50399
HighCVSS 7.8
Windows Kernel Elevation of Privilege Vulnerability
Out-of-bounds read in Windows Kernel allows an authorized attacker to elevate privileges locally.
Affected productsWindows Server 2022, Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems
Fixed versions10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548, 10.0.26100.33158
Vendor guidance
Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50398
HighCVSS 8.8
Windows Media Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Media allows an authorized attacker to elevate privileges over a network.
Affected productsWindows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems
Fixed versions10.0.26100.33158, 10.0.26200.8875, 10.0.26100.8875, 10.0.28000.2525
Vendor guidance
Install KB5099536. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50397
HighCVSS 7.0
Windows Kernel Elevation of Privilege Vulnerability
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535. Install KB5099445. Install KB5099444.
Microsoft Security Response CenterCVE-2026-50396
HighCVSS 7.0
Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.
Affected productsWindows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems
Fixed versions10.0.26100.33158, 10.0.26200.8875, 10.0.26100.8875, 10.0.28000.2525
Vendor guidance
Install KB5099536. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50394
HighCVSS 5.5
Windows Media Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows Media allows an authorized attacker to disclose information locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535. Install KB5099444.
Microsoft Security Response CenterCVE-2026-50393
HighCVSS 7.0
Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.
Affected productsWindows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems
Fixed versions10.0.26100.33158, 10.0.26200.8875, 10.0.26100.8875, 10.0.28000.2525
Vendor guidance
Install KB5099536. Install KB5101650. Install KB5101649.
Microsoft Security Response CenterCVE-2026-50391
HighCVSS 7.8
Windows Group Policy Elevation of Privilege Vulnerability
Improper privilege management in Windows Group Policy allows an authorized attacker to elevate privileges locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535. Install KB5099445. Install KB5099444.
Microsoft Security Response CenterCVE-2026-50390
HighCVSS 7.0
Windows Kernel Elevation of Privilege Vulnerability
Access of resource using incompatible type ('type confusion') in Windows Kernel allows an authorized attacker to elevate privileges locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535. Install KB5099445. Install KB5099444.
Microsoft Security Response CenterCVE-2026-50389
HighCVSS 5.5
Windows File Explorer Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535.
Microsoft Security Response CenterCVE-2026-50388
HighCVSS 7.8
Windows NTFS Remote Code Execution Vulnerability
Out-of-bounds read in Windows NTFS allows an unauthorized attacker to execute code locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535. Install KB5099445. Install KB5099444.
Microsoft Security Response CenterCVE-2026-50386
HighCVSS 7.8
Windows NTFS Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9020, 10.0.20348.5386, 10.0.19044.7548, 10.0.19045.7548
Vendor guidance
Install KB5099538. Install KB5099540. Install KB5099539. Install KB5099536. Install KB5101650. Install KB5101649. Install KB5099535. Install KB5099445. Install KB5099444.
Microsoft Security Response CenterCVE-2026-50385
HighCVSS 8.8
Windows Runtime Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.
Affected productsWindows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems
Fixed versions10.0.26100.33158, 10.0.26200.8875, 10.0.26100.8875, 10.0.28000.2525
Vendor guidance
Install KB5099536. Install KB5101650. Install KB5101649.
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Start with the vendor's bulletin.
We normalize the fields that vendors publish so you can search and compare advisories in one place. We do not replace the original bulletin or turn a product-name match into proof that a system is vulnerable.
Confirm the installed product and version, read the linked vendor guidance, and test the recommended update or mitigation through your normal change process.