CVE-2026-123390
Microsoft Office SharePoint Remote Code Execution vulnerability
MSRC advisory November 10, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-123390
- Affected products
- Microsoft Office SharePoint Remote Code Execution · Microsoft Microsoft Office SharePoint 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 Office SharePoint Remote Code Execution vulnerability (CVE-2026-123390) 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
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