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CVE-2026-45659CISA KEV

Microsoft SharePoint Server 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 Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.

Product
SharePoint Server
Added to KEV
1 Jul 2026
Federal remediation due
4 Jul 2026
Known ransomware use
Yes
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