Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
High Listed in 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.
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- Microsoft:SharePoint
Sources
- CISA KEV DATABASE
Original Links
- https://nvd.nist.gov/vuln/detail/CVE-2025-53770 advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog kev
- https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770; reference
- https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ reference
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770 reference
Timeline
- kev_added CISA KEV
- kev_ingest CISA KEV