{"cve_id":"CVE-2025-53770","published":"2025-07-20T01:15:30.777000+00:00","last_modified":"2026-08-04T05:16:34.887000+00:00","vuln_status":"Analyzed","description":"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.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","base_score":9.8,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-502"],"in_kev":true,"kev_date_added":"2025-07-20","kev_ransomware":true,"epss_score":0.99999,"epss_percentile":0.99991,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T11:41:25.639182+00:00","first_seen":"2025-07-20T01:15:30.777000+00:00","kev_first_seen":"2025-07-20T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["microsoft"],"products":["sharepoint_server"],"affected":[{"vendor":"microsoft","product":"sharepoint_server","ranges":["< 16.0.18526.20508","2016","2019"]}]}