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Vendor advisories

Microsoft Security Response Center

Browse 17,903 advisories from this official source. Search by product, CVE, severity, or advisory ID.

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17,903 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.

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Microsoft Security Response CenterCVE-2026-45659
HighCVSS 8.8

Microsoft SharePoint Remote Code Execution Vulnerability

Deserialization of untrusted data 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 versions16.0.5552.1002, 16.0.10417.20128, 16.0.19725.20280
Vendor guidance

Install KB5002868. Install KB5002870. Install KB5002863.

CVE-2026-45659
Read the vendor advisory Watch this product
Microsoft Security Response CenterCVE-2026-45498
LowCVSS 4.0

Microsoft Defender Denial of Service Vulnerability

References Identification Last version of the Microsoft Defender Antimalware Platform affected by this vulnerability 4.18.26030.3011 First version of the Microsoft Defender Antimalware Platform with this vulnerability addressed Version 4.18.26040.7 See Manage Updates Baselines...

Affected productsMicrosoft Defender Antimalware Platform
Fixed versions4.18.26040.7
Vendor guidance

Release Notes

CVE-2026-45498
Read the vendor advisory Watch this product
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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