Vendor advisories

Microsoft Security Response Center

Browse 15,972 advisories from this official source. Search by product, CVE, severity, or advisory ID.

Current Checked 32 minutes ago Checked every 6 hours

15,972 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-2026-69501
CriticalCVSS 7.0

Windows Secure Kernel Mode Elevation of Privilege Vulnerability

Untrusted pointer dereference in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

Affected productsWindows Server 2022, Windows Server 2022 (Server Core installation), Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems
Fixed versions10.0.20348.5622, 10.0.19044.7725, 10.0.19045.7725, 10.0.26100.33438
Vendor guidance

Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012.

Microsoft Security Response CenterCVE-2026-69285
CriticalCVSS 8.8

Microsoft Office Remote Code Execution Vulnerability

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

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 KB5002916.

Microsoft Security Response CenterCVE-2026-66302
CriticalCVSS 9.8

Skype for Business Remote Code Execution Vulnerability

External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.

Affected productsSkype for Business Server 2019 CU8, Skype for Business Server Subscription Edition CU1, Skype for Business Server 2015 CU13
Fixed versions7.0.2046.879, 7.0.2046.569, 6.0.9319.885
Vendor guidance

Install KB5123287. Install KB5123300. Install KB5123301.

Microsoft Security Response CenterCVE-2026-58599
CriticalCVSS 7.8

HEVC Video Extensions Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code locally.

Affected productsHEVC Video Extensions, HEVC Video Extensions for Licensed Applications, HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for 32-bit Systems, HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for x64-based Systems
Fixed versions2.4.87.0, 2.4.85.0, 2.4.86.0, 2.5.25.0
Vendor guidance

Update Information

Microsoft Security Response CenterCVE-2026-34182
CriticalCVSS 9.1

CMS AuthEnvelopedData Processing May Accept Forged Messages

Mariner

Affected productsMicrosoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10), Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), azl3 edk2 20240524git3e722403cd16-17 on Azure Linux 3.0
Fixed versions16.11.60, 15.9.83, 17.14.40, 20240524git3e722403cd16-18
Vendor guidance

Release Notes CBL-Mariner Releases

Microsoft Security Response CenterCVE-2026-62823
CriticalCVSS 8.8

Windows DHCP Server Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over an adjacent network.

Affected productsWindows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation)
Fixed versions10.0.17763.9121, 10.0.20348.5499, 10.0.20348.5440, 10.0.26100.33296
Vendor guidance

Install KB5120238. Install KB5120242. Install KB5120229. Install KB5120233. Install KB5120228. Install KB5120418. Install KB5120386. Install KB5120385.

Microsoft Security Response CenterCVE-2026-65789
CriticalCVSS 8.1

Windows DNS Server Remote Code Execution Vulnerability

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

Affected productsWindows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation)
Fixed versions10.0.17763.9121, 10.0.20348.5499, 10.0.20348.5440, 10.0.26100.33296
Vendor guidance

Install KB5120238. Install KB5120242. Install KB5120229. Install KB5120233. Install KB5120228. Install KB5120418.

Microsoft Security Response CenterCVE-2026-62893
CriticalCVSS 9.8

Windows Deployment Services TFTP Server Remote Code Execution Vulnerability

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

Affected productsWindows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation)
Fixed versions10.0.17763.9121, 10.0.20348.5499, 10.0.20348.5440, 10.0.26100.33296
Vendor guidance

Install KB5120238. Install KB5120242. Install KB5120229. Install KB5120233. Install KB5120228. Install KB5120418. Install KB5120386. Install KB5120385.

Microsoft Security Response CenterCVE-2026-62878
CriticalCVSS 9.8

Windows DNS Server Remote Code Execution Vulnerability

Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.

Affected productsWindows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation)
Fixed versions10.0.17763.9121, 10.0.20348.5499, 10.0.20348.5440, 10.0.26100.33296
Vendor guidance

Install KB5120238. Install KB5120242. Install KB5120229. Install KB5120233. Install KB5120228. Install KB5120418. Install KB5120386. Install KB5120385.

Microsoft Security Response CenterCVE-2026-62820
CriticalCVSS 8.1

Windows DNS Server Remote Code Execution Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an unauthorized attacker to execute code over a network.

Affected productsWindows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation)
Fixed versions10.0.17763.9121, 10.0.20348.5499, 10.0.20348.5440, 10.0.26100.33296
Vendor guidance

Install KB5120238. Install KB5120242. Install KB5120229. Install KB5120233. Install KB5120228. Install KB5120418.

Microsoft Security Response CenterCVE-2026-62817
CriticalCVSS 8.8

Windows DNS Server Remote Code Execution Vulnerability

Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.

Affected productsWindows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation)
Fixed versions10.0.17763.9121, 10.0.20348.5499, 10.0.20348.5440, 10.0.26100.33296
Vendor guidance

Install KB5120238. Install KB5120242. Install KB5120229. Install KB5120233. Install KB5120228.

Microsoft Security Response CenterCVE-2026-42914
HighCVSS 5.3

Windows Kerberos Denial of Service Vulnerability

Out-of-bounds read in Windows Kerberos allows an authorized attacker to deny service 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 versions10.0.17763.8880, 10.0.20348.5256, 10.0.19044.7417, 10.0.19045.7417
Vendor guidance

Install KB5094123. Install KB5094128. Install KB5094127. Install KB5094125. Install KB5094126. Install KB5093998. Install KB5095051. Install KB5094122. Install KB5094042. Install KB5094041.

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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