Vendor advisories

Microsoft Security Response Center

Browse 15,888 advisories from this official source. Search by product, CVE, severity, or advisory ID.

Current Checked 4 hours ago Checked every 6 hours

15,888 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.

RSS for these results
Microsoft Security Response CenterCVE-2026-96313
HighCVSS 7.0

Windows Push Notifications Elevation of Privilege Vulnerability

Missing authentication for critical function in Windows Push Notifications 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 versions10.0.17763.9376, 10.0.19044.7807, 10.0.19045.7807, 10.0.20348.5761
Vendor guidance

Install KB5126651. Install KB5126657. Install KB5126655. Install KB5126653. Install KB5127648. Install KB5126646. Install KB5127646.

Microsoft Security Response CenterCVE-2026-96183
HighCVSS 5.5

Windows Health and Optimized Experiences Service Information Disclosure Vulnerability

Missing authentication for critical function in Windows Health and Optimized Experiences Service allows an authorized attacker to disclose information locally.

Affected productsWindows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems
Fixed versions10.0.26100.9711, 10.0.26200.9711, 10.0.26300.9711, 10.0.28000.3231
Vendor guidance

Install KB5127648. Install KB5127646.

Microsoft Security Response CenterCVE-2026-85884
HighCVSS 7.8

Windows Health and Optimized Experiences Service Elevation of Privilege Vulnerability

Missing authentication for critical function in Windows Health and Optimized Experiences Service 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 versions10.0.26200.9711, 10.0.26100.9711, 10.0.28000.3231, 10.0.26300.9711
Vendor guidance

Install KB5127648. Install KB5127646.

Microsoft Security Response CenterCVE-2026-83715
HighCVSS 7.1

Windows Error Reporting Tampering Vulnerability

Missing authentication for critical function in Windows Error Reporting allows an authorized attacker to perform tampering 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-83656
HighCVSS 4.7

Windows Modern Device Management (MDM) Tampering Vulnerability

Missing authentication for critical function in Windows Modern Device Management (MDM) allows an authorized attacker to perform tampering locally.

Affected productsWindows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows Server 2022
Fixed versions10.0.19044.7807, 10.0.19045.7807, 10.0.20348.5761, 10.0.22631.7652
Vendor guidance

Install KB5126657. Install KB5126655. Install KB5126653. Install KB5127648. Install KB5126646. Install KB5127646.

Microsoft Security Response CenterCVE-2026-70580
HighCVSS 8.8

Windows Credential Guard Spoofing Vulnerability

Missing authentication for critical function in Windows Credential Guard allows an authorized attacker to perform spoofing locally.

Affected productsWindows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems
Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807
Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646.

Microsoft Security Response CenterCVE-2026-62879
HighCVSS 5.5

Windows SmartScreen Tampering Vulnerability

Missing authentication for critical function in Windows SmartScreen allows an authorized attacker to perform tampering locally.

Affected productsWindows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems
Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807
Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646.

Microsoft Security Response CenterCVE-2026-97814
CriticalCVSS 9.8

Windows Text Shaping Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Text Shaping allows an unauthorized attacker to execute code over a network.

Affected productsWindows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)
Fixed versions6.2.9200.26434, 6.3.9600.23470, 10.0.14393.9612, 10.0.17763.9376
Vendor guidance

Install KB5126835. Install KB5126836. Install KB5126868. Install KB5126651. Install KB5126653. Install KB5127648. Install KB5126646. Install KB5127646. Install KB5126657. Install KB5126655.

Microsoft Security Response CenterCVE-2026-97749
CriticalCVSS 9.8

Microsoft Office Outlook Remote Code Execution Vulnerability

Double free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC 2024 for 32-bit editions
Fixed versions16.0.14334.20974, 16.0.17932.21056, https://aka.ms/OfficeSecurityReleases
Vendor guidance

Release Notes

Microsoft Security Response CenterCVE-2026-97016
CriticalCVSS 9.8

Microsoft Office Outlook Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC 2024 for 32-bit editions
Fixed versions16.0.14334.20974, 16.0.17932.21056, https://aka.ms/OfficeSecurityReleases
Vendor guidance

Release Notes

Microsoft Security Response CenterCVE-2026-96952
CriticalCVSS 8.8

Microsoft Windows Media Foundation Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code 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 versions10.0.17763.9376, 10.0.19044.7807, 10.0.19045.7807, 10.0.20348.5761
Vendor guidance

Install KB5126651. Install KB5126657. Install KB5126655. Install KB5126653. Install KB5127648. Install KB5126646. Install KB5127646.

Microsoft Security Response CenterCVE-2026-96943
CriticalCVSS 8.8

Windows Raw Image Extension Remote Code Execution Vulnerability

Integer overflow or wraparound in Windows Raw Image Extension allows an unauthorized attacker to execute code over a network.

Affected productsRaw Image Extension on Windows 10 Version 1607 for x64-based Systems, Raw Image Extension on Windows 10 Version 1607 for 32-bit Systems, Raw Image Extension on Windows 10 for x64-based Systems, Raw Image Extension on Windows 10 for 32-bit Systems
Fixed versions2.4.36.0, 2.5.35.0
Vendor guidance

Release Notes

Microsoft Security Response CenterCVE-2026-96934
CriticalCVSS 9.8

Windows DHCP Server Remote Code Execution Vulnerability

Use after free in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

Affected productsWindows Server 2012 R2 (Server Core installation), Windows 10 Version 1607 for x64-based Systems, Windows Server 2016, Windows Server 2016 (Server Core installation)
Fixed versions6.3.9600.23470, 10.0.14393.9612, 10.0.17763.9376, 10.0.26100.33650
Vendor guidance

Install KB5126836. Install KB5126868. Install KB5126651. Install KB5126646. Install KB5126835. Install KB5126655.

Microsoft Security Response CenterCVE-2026-96914
CriticalCVSS 8.8

Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability

Integer overflow or wraparound in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

Affected productsWindows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems
Fixed versions10.0.22631.7652, 10.0.26100.9711, 10.0.26200.9711, 10.0.26300.9711
Vendor guidance

Install KB5126653. Install KB5127648. Install KB5126646. Install KB5127646. Install KB5126868. Install KB5126651. Install KB5126657. Install KB5126655.

Microsoft Security Response CenterCVE-2026-88174
CriticalCVSS 8.1

Windows Deployment Services Remote Code Execution Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Deployment Services allows an unauthorized attacker to execute code 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.26100.33650, 10.0.14393.9612
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-88171
CriticalCVSS 8.1

Windows DHCP Server Remote Code Execution Vulnerability

Double free in Windows DHCP Server allows an unauthorized attacker to execute code 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.26100.33650, 10.0.14393.9612
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-88120
CriticalCVSS 8.1

Windows DHCP Server Remote Code Execution Vulnerability

Use after free in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

Affected productsWindows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)
Fixed versions6.2.9200.26434, 6.3.9600.23470, 10.0.14393.9612, 10.0.17763.9376
Vendor guidance

Install KB5126835. Install KB5126836. Install KB5126868. Install KB5126651. Install KB5126655. Install KB5126646.

Microsoft Security Response CenterCVE-2026-88119
CriticalCVSS 8.1

Windows DHCP Server Remote Code Execution Vulnerability

Use after free in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

Affected productsWindows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)
Fixed versions6.2.9200.26434, 6.3.9600.23470, 10.0.14393.9612, 10.0.17763.9376
Vendor guidance

Install KB5126835. Install KB5126836. Install KB5126868. Install KB5126651. Install KB5126655. Install KB5126646.

Microsoft Security Response CenterCVE-2026-88117
CriticalCVSS 8.1

Windows DHCP Server Remote Code Execution Vulnerability

Use after free in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

Affected productsWindows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)
Fixed versions6.2.9200.26434, 6.3.9600.23470, 10.0.14393.9612, 10.0.17763.9376
Vendor guidance

Install KB5126835. Install KB5126836. Install KB5126868. Install KB5126651. Install KB5126655. Install KB5126646.

Microsoft Security Response CenterCVE-2026-88073
CriticalCVSS 8.8

Windows Graphics Kernel Elevation of Privilege Vulnerability

Use after free in Windows Graphics Kernel 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 32-bit Systems
Fixed versions10.0.19044.7807, 10.0.19045.7807, 10.0.22631.7652, 10.0.26100.9711
Vendor guidance

Install KB5126657. Install KB5126653. Install KB5127648. Install KB5126646. Install KB5127646.

Microsoft Security Response CenterCVE-2026-83934
CriticalCVSS 8.8

Windows GDI+ Remote Code Execution Vulnerability

Stack-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code 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 versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-83917
CriticalCVSS 7.0

Windows ALPC Elevation of Privilege Vulnerability

Use after free in Windows ALPC allows an authorized attacker to elevate privileges locally.

Affected productsWindows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2025, Windows Server 2025 (Server Core installation)
Fixed versions10.0.26300.9711, 10.0.26100.33650, 10.0.28000.3231, 10.0.17763.9376
Vendor guidance

Install KB5127648. Install KB5126646. Install KB5127646. Install KB5126651. Install KB5126657. Install KB5126655. Install KB5126653.

Microsoft Security Response CenterCVE-2026-70571
CriticalCVSS 8.1

Microsoft Exchange Server Remote Code Execution Vulnerability

Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14
Fixed versions15.02.1748.055, 15.02.2562.056, 15.01.2507.077, 15.02.1544.050
Vendor guidance

Install KB5128896. Install KB5128895. Install KB5128898. Install KB5128897.

Microsoft Security Response CenterCVE-2026-70300
CriticalCVSS 9.8

Microsoft Office Word Remote Code Execution Vulnerability

Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2021 for 32-bit editions
Fixed versionshttps://aka.ms/OfficeSecurityReleases, 16.0.14334.20974, 16.0.17932.21056
Vendor guidance

Release Notes

Before you act

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.

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