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4,737 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-2026-83968
HighCVSS 7.8
Windows Biometric Service Elevation of Privilege Vulnerability
Use after free in Windows Biometric Service 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 versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725
Vendor guidance
Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099.
Microsoft Security Response CenterCVE-2026-83967
HighCVSS 7.8
Windows Biometric Service Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Biometric Service 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 versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725
Vendor guidance
Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099.
Microsoft Security Response CenterCVE-2026-83955
HighCVSS 7.8
Windows Biometric Service Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Biometric Service 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 versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725
Vendor guidance
Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099.
Microsoft Security Response CenterCVE-2026-83954
HighCVSS 7.8
Windows Biometric Service Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Biometric Service 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 versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725
Vendor guidance
Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099.
Microsoft Security Response CenterCVE-2026-83952
HighCVSS 7.8
Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Resilient File System (ReFS) 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 versions10.0.26100.33438, 10.0.26200.9445, 10.0.26100.9445, 10.0.28000.2954
Vendor guidance
Install KB5122871. Install KB5124008. Install KB5124012.
Microsoft Security Response CenterCVE-2026-83951
HighCVSS 5.5
Microsoft Office Word Information Disclosure Vulnerability
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Affected productsMicrosoft Word 2016 (64-bit edition), Microsoft Word 2016 (32-bit edition), Microsoft Office 2019 for 64-bit editions, Microsoft Office 2019 for 32-bit editions
Fixed versions16.0.5569.1000, 16.0.10417.20207, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002923.
Microsoft Security Response CenterCVE-2026-83949
HighCVSS 5.5
Microsoft Office Word Information Disclosure Vulnerability
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Affected productsMicrosoft Word 2016 (64-bit edition), Microsoft Word 2016 (32-bit edition), Microsoft Office 2019 for 64-bit editions, Microsoft Office 2019 for 32-bit editions
Fixed versions16.0.5569.1000, 16.0.10417.20207, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002923.
Microsoft Security Response CenterCVE-2026-83948
HighCVSS 8.0
Microsoft Azure CLI Remote Code Execution Vulnerability
Improper neutralization of special elements used in a command ('command injection') in Microsoft Azure CLI allows an authorized attacker to execute code over a network.
Affected productsMicrosoft Azure CLI
Fixed versions2.2.1
Vendor guidance
Release Notes
Microsoft Security Response CenterCVE-2026-83942
HighCVSS 7.8
Windows Kernel Elevation of Privilege Vulnerability
Missing authorization 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 versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725
Vendor guidance
Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012.
Microsoft Security Response CenterCVE-2026-83940
HighCVSS 7.0
Windows Device Association Service Elevation of Privilege Vulnerability
Use after free in Windows Device Association Service 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 versions10.0.17763.9245, 10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725
Vendor guidance
Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012. Install KB5123099.
Microsoft Security Response CenterCVE-2026-81960
HighCVSS 7.8
Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected productsMicrosoft Office 365 for Mac, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81958
HighCVSS 5.5
Microsoft Excel Information Disclosure Vulnerability
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81957
HighCVSS 7.8
Microsoft Excel Remote Code Execution Vulnerability
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81956
HighCVSS 7.8
Microsoft Excel Remote Code Execution Vulnerability
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected productsMicrosoft Office 365 for Mac, Office Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002910. Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81954
HighCVSS 7.8
Microsoft Excel Remote Code Execution Vulnerability
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected productsMicrosoft Office 365 for Mac, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81947
HighCVSS 7.8
Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code 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 versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002910. Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81401
HighCVSS 5.5
Microsoft Excel Information Disclosure Vulnerability
Access of resource using incompatible type ('type confusion') 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 versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002910. Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81400
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 productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81399
HighCVSS 5.5
Microsoft Excel Information Disclosure Vulnerability
Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81398
HighCVSS 7.8
Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81397
HighCVSS 7.8
Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81396
HighCVSS 7.8
Microsoft Excel Remote Code Execution Vulnerability
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected productsMicrosoft Office 365 for Mac, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81395
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 productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
Microsoft Security Response CenterCVE-2026-81394
HighCVSS 5.5
Microsoft Excel Information Disclosure Vulnerability
Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906, 16.0.17932.20976
Vendor guidance
Release Notes Install KB5002914. Install KB5002904.
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Start with the vendor's bulletin.
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Confirm the installed product and version, read the linked vendor guidance, and test the recommended update or mitigation through your normal change process.
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