Vendor advisories

Microsoft Security Response Center

Browse 17,776 advisories from this official source. Search by product, CVE, severity, or advisory ID.

Current Checked about an hour ago Checked every 6 hours

17,776 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-2026-45591
HighCVSS 7.5

ASP.NET Core Denial of Service Vulnerability

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Affected productsMicrosoft Visual Studio 2026 version 18.6, .NET 10.0 runtime installed on Windows, .NET 10.0 runtime installed on Mac OS, ASP.NET Core 10.0
Fixed versions18.6.3, 10.0.9, 8.0.28, 9.0.17
Vendor guidance

Release Notes Install KB5097148. Install KB5097149. Install KB5097150.

Microsoft Security Response CenterCVE-2026-45588
HighCVSS 7.9

Secure Boot Security Feature Bypass Vulnerability

Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature 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 versions10.0.17763.8880, 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.

Microsoft Security Response CenterCVE-2026-45586
HighCVSS 7.8

Windows Collaborative Translation Framework (CTFMON) Elevation of Privilege Vulnerability

Improper link resolution before file access ('link following') in Windows Collaborative Translation Framework 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 versions10.0.17763.8880, 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.

Microsoft Security Response CenterCVE-2026-45583
HighCVSS 7.5

Microsoft Exchange Server Remote Code Execution Vulnerability

Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server Subscription Edition RTM
Fixed versions15.01.2507.071, 15.02.1544.043, 15.02.1748.048, 15.02.2562.045
Vendor guidance

Install KB5103215. Install KB5103214. Install KB5103213. Install KB5103212.

Microsoft Security Response CenterCVE-2026-45503
HighCVSS 8.1

Microsoft Exchange Server Information Disclosure Vulnerability

Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

Affected productsMicrosoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server 2019 Cumulative Update 14
Fixed versions15.01.2507.071, 15.02.2562.045, 15.02.1748.048, 15.02.1544.043
Vendor guidance

Install KB5103215. Install KB5103212. Install KB5103213. Install KB5103214.

Microsoft Security Response CenterCVE-2026-45502
HighCVSS 5.0

Microsoft Exchange Server Information Disclosure Vulnerability

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

Affected productsMicrosoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server Subscription Edition RTM
Fixed versions15.02.1544.043, 15.02.1748.048, 15.01.2507.071, 15.02.2562.045
Vendor guidance

Install KB5103214. Install KB5103213. Install KB5103215. Install KB5103212.

Microsoft Security Response CenterCVE-2026-45501
HighCVSS 6.5

Microsoft Exchange Server Spoofing Vulnerability

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.

Affected productsMicrosoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server 2019 Cumulative Update 14
Fixed versions15.02.2562.045, 15.01.2507.071, 15.02.1748.048, 15.02.1544.043
Vendor guidance

Install KB5103212. Install KB5103215. Install KB5103213. Install KB5103214.

Microsoft Security Response CenterCVE-2026-45500
HighCVSS 6.1

Microsoft Exchange Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Affected productsMicrosoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server 2016 Cumulative Update 23
Fixed versions15.02.1544.043, 15.02.2562.045, 15.02.1748.048, 15.01.2507.071
Vendor guidance

Install KB5103214. Install KB5103212. Install KB5103213. Install KB5103215.

Microsoft Security Response CenterCVE-2026-45491
HighCVSS 6.2

.NET Tampering Vulnerability

Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.

Affected products.NET 10.0 runtime installed on Windows, .NET 10.0 runtime installed on Mac OS, .NET 10.0 runtime installed on Linux, .NET 8.0
Fixed versions10.0.9, 8.0.28, 9.0.17
Vendor guidance

Install KB5097148. Install KB5097149. Install KB5097150.

Microsoft Security Response CenterCVE-2026-45490
HighCVSS 7.8

.NET SDK Elevation of Privilege Vulnerability

Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

Affected products.NET 10.0 runtime installed on Windows, .NET 8.0 runtime installed on Windows, .NET 9.0 runtime installed on Windows
Fixed versions10.0.9, 8.0.28, 9.0.17
Vendor guidance

Install KB5097148. Install KB5097149. Install KB5097150.

Microsoft Security Response CenterCVE-2026-45487
HighCVSS 7.8

Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerability

Time-of-check time-of-use (TOCTOU) race condition in Program Compatibility Assistant Service 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 versions10.0.20348.5256, 10.0.19044.7417, 10.0.19045.7417, 10.0.26100.32995
Vendor guidance

Install KB5094128. Install KB5094127. Install KB5094125. Install KB5094126. Install KB5093998. Install KB5095051.

Microsoft Security Response CenterCVE-2026-45484
HighCVSS 8.8

Microsoft SharePoint Elevation of Privilege Vulnerability

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5556.1005, 16.0.10417.20153, 16.0.19725.20384
Vendor guidance

Install KB5002880. Install KB5002874. Install KB5002873.

Microsoft Security Response CenterCVE-2026-45483
HighCVSS 4.6

Microsoft Office Project Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office Project Server allows an authorized attacker to perform spoofing over a network.

Affected productsMicrosoft SharePoint Server Subscription Edition, Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019
Fixed versions16.0.19725.20384, 16.0.5556.1005, 16.0.10417.20153
Vendor guidance

Install KB5002873. Install KB5002880. Install KB5002874.

Microsoft Security Response CenterCVE-2026-45481
HighCVSS 7.3

Microsoft SharePoint Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5556.1005, 16.0.10417.20153, 16.0.19725.20384
Vendor guidance

Install KB5002880. Install KB5002874. Install KB5002873.

Microsoft Security Response CenterCVE-2026-45479
HighCVSS 4.6

Microsoft SharePoint Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5556.1005, 16.0.10417.20153, 16.0.19725.20384
Vendor guidance

Install KB5002880. Install KB5002874. Install KB5002873.

Microsoft Security Response CenterCVE-2026-45468
HighCVSS 4.6

Microsoft SharePoint Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5556.1005, 16.0.10417.20153, 16.0.19725.20384
Vendor guidance

Install KB5002880. Install KB5002874. Install KB5002873.

Microsoft Security Response CenterCVE-2026-45467
HighCVSS 4.6

Microsoft SharePoint Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5556.1005, 16.0.10417.20153, 16.0.19725.20384
Vendor guidance

Install KB5002880. Install KB5002874. Install KB5002873.

Microsoft Security Response CenterCVE-2026-45464
HighCVSS 5.4

Microsoft SharePoint Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5556.1005, 16.0.10417.20153, 16.0.19725.20384
Vendor guidance

Install KB5002880. Install KB5002874. Install KB5002873.

Microsoft Security Response CenterCVE-2026-45462
HighCVSS 4.6

Microsoft SharePoint Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5556.1005, 16.0.10417.20153, 16.0.19725.20384
Vendor guidance

Install KB5002880. Install KB5002874. Install KB5002873.

Microsoft Security Response CenterCVE-2026-45454
HighCVSS 6.5

Microsoft SharePoint Remote Code Execution Vulnerability

Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5556.1005, 16.0.10417.20153, 16.0.19725.20384
Vendor guidance

Install KB5002880. Install KB5002874. Install KB5002873.

Microsoft Security Response CenterCVE-2026-45453
HighCVSS 5.4

Microsoft SharePoint Server Spoofing Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Affected productsMicrosoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Fixed versions16.0.5556.1005, 16.0.10417.20153, 16.0.19725.20384
Vendor guidance

Install KB5002880. Install KB5002874. Install KB5002873.

Microsoft Security Response CenterCVE-2026-44811
HighCVSS 7.8

Windows DWM Core Library Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

Affected productsWindows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems
Fixed versions10.0.28000.2269
Vendor guidance

Install KB5095051.

Microsoft Security Response CenterCVE-2026-44809
HighCVSS 7.8

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Use after free in Windows Common Log File System Driver 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 Server 2025
Fixed versions10.0.26100.32995, 10.0.26200.8655, 10.0.26100.8655, 10.0.28000.2269
Vendor guidance

Install KB5094125. Install KB5094126. Install KB5095051.

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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