UNKNOWNKNOWN EXPLOITEDRANSOMWARE: KNOWN

CVE-2025-53770

Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

Published: 2025-07-20
Modified: 2026-07-31
Sources: cisa-kev

Summary

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.

References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Includes data from the CISA Known Exploited Vulnerabilities catalog.

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