CVE-2026-66808
Microsoft SharePoint Server Remote Code Execution vulnerability
MSRC advisory August 11, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-66808
- Affected products
- Microsoft SharePoint Server Remote Code Execution · Microsoft Microsoft SharePoint Server Remote Code Execution · Microsoft
What happened
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
What it means for your business
Microsoft SharePoint Server Remote Code Execution vulnerability (CVE-2026-66808) was added to Microsoft’s security update guidance. Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network. If you need help checking exposure, call (864) 335-9223.
Sources
Related briefs
Windows DHCP Client Remote Code Execution vulnerability
Windows DHCP Client Remote Code Execution vulnerability (CVE-2026-54128) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. If you need help checking exposure, call (864) 335-9223.
Windows GDI Elevation of Privilege vulnerability
Windows GDI Elevation of Privilege vulnerability (CVE-2026-50387) was added to Microsoft’s security update guidance. Updated an acknowledgement. This is an informational change only. If you need help checking exposure, call (864) 335-9223.
Heap buffer overflow in ANGLE in Microsoft Edge vulnerability
Heap buffer overflow in ANGLE in Microsoft Edge vulnerability (CVE-2025-10502) was added to Microsoft’s security update guidance. Information published. If you need help checking exposure, call (864) 335-9223.
Microsoft Exchange Server Elevation of Privilege vulnerability
Microsoft Exchange Server Elevation of Privilege vulnerability (CVE-2026-96940) was added to Microsoft’s security update guidance. Weak authorization in Microsoft Exchange Server allows an authenticated attacker to elevate privileges over a network. If you need help checking exposure, call (864) 335-9223.
Need help patching?
PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.