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CVE-2026-20963CISA KEV

Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.

CISA KEV Check MSRC

CISA catalog record

Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.

Product
SharePoint
Added to KEV
18 Mar 2026
Federal remediation due
21 Mar 2026
Known ransomware use
Not reported
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