CVE-2026-20963

Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

Details

CISA date: 2026-03-18
Affected versions: SharePoint
Summary: Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
Remediation: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Exploit info: No exploit-tagged NVD references in our cache; see the CISA KEV link below.

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Information is aggregated from multiple authoritative sources for convenience; verify with NVD and vendors before operational decisions.