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CVE-2025-53770CISA 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 Server on-premises contains a deserialization of untrusted data vulnerability that could allow an unauthorized attacker to execute code over a network. This vulnerability could be chained with CVE-2025-53771. CVE-2025-53770 is a patch bypass for CVE-2025-49704, and the updates for CVE-2025-53770 include more robust protection than those for CVE-2025-49704.

Product
SharePoint
Added to KEV
20 Jul 2025
Federal remediation due
21 Jul 2025
Known ransomware use
Yes
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