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{"cisaActionDue": "2025-07-21", "cisaExploitAdd": "2025-07-20", "cisaRequiredAction": "Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions. For supported versions, please follow the mitigations according to CISA (URL listed below in Notes) and vendor instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.", "cisaVulnerabilityName": "Microsoft SharePoint Deserialization of Untrusted Data Vulnerability", "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*", "matchCriteriaId": "E1677A89-14A2-496E-A2EB-387B1BFE876C", "versionEndExcluding": "16.0.18526.20508", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*", "matchCriteriaId": "F815EF1D-7B60-47BE-9AC2-2548F99F10E4", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*", "matchCriteriaId": "6122D014-5BF1-4AF4-8B4D-80205ED7785E", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network.\nMicrosoft is aware that an exploit for CVE-2025-53770 exists in the wild.\nMicrosoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation."}, {"lang": "es", "value": "La deserializaci\u00f3n de datos no confiables en on-premises Microsoft SharePoint Server permite que un atacante no autorizado ejecute c\u00f3digo a trav\u00e9s de la red. Microsoft tiene conocimiento de la existencia de un exploit para CVE-2025-53770. Microsoft est\u00e1 preparando y probando a fondo una actualizaci\u00f3n completa para abordar esta vulnerabilidad. Mientras tanto, aseg\u00farese de que la mitigaci\u00f3n proporcionada en esta documentaci\u00f3n de CVE est\u00e9 implementada para estar protegido contra el exploit."}], "id": "CVE-2025-53770", "lastModified": "2025-07-30T01:00:01.490", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "secure@microsoft.com", "type": "Secondary"}]}, "published": "2025-07-20T01:15:30.777", "references": [{"source": "secure@microsoft.com", "tags": ["Vendor Advisory"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Press/Media Coverage"], "url": "https://arstechnica.com/security/2025/07/sharepoint-vulnerability-with-9-8-severity-rating-is-under-exploit-across-the-globe/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit"], "url": "https://github.com/kaizensecurity/CVE-2025-53770"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking"], "url": "https://news.ycombinator.com/item?id=44629710"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mitigation", "Third Party Advisory"], "url": "https://research.eye.security/sharepoint-under-siege/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Press/Media Coverage"], "url": "https://therecord.media/microsoft-sharepoint-zero-day-vulnerability-exploited-globally"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Press/Media Coverage"], "url": "https://www.bleepingcomputer.com/news/microsoft/microsoft-sharepoint-zero-day-exploited-in-rce-attacks-no-patch-available/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory", "US Government Resource"], "url": "https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Press/Media Coverage"], "url": "https://www.darkreading.com/remote-workforce/microsoft-rushes-emergency-fix-exploited-sharepoint-toolshell-flaw"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Press/Media Coverage"], "url": "https://www.forbes.com/sites/daveywinder/2025/07/20/microsoft-confirms-ongoing-mass-sharepoint-attack---no-patch-available/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://x.com/Shadowserver/status/1946900837306868163"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "secure@microsoft.com", "type": "Secondary"}]}

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