CVE-2026-20959HighCVSS 4.6
Microsoft SharePoint Server Spoofing Vulnerability
🔗 CVE IDs covered (1)
📋 Description
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 products3
- Microsoft SharePoint Enterprise Server 2016
- Microsoft SharePoint Server 2019
- Microsoft SharePoint Server Subscription Edition
✅ Remediation
KB5002828 (Security Update) — fixed build 16.0.5535.1001 KB5002825 (Security Update) — fixed build 16.0.10417.20083 KB5002822 (Security Update) — fixed build 16.0.19127.20442
🔗 References (7)
- advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20959
- patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108518
- referencehttps://support.microsoft.com/help/5002828
- patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108525
- referencehttps://support.microsoft.com/help/5002825
- patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108517
- referencehttps://support.microsoft.com/help/5002822