{"cve_id":"CVE-2026-58644","published":"2026-07-14T17:17:14.257000+00:00","last_modified":"2026-07-17T05:16:40.470000+00:00","vuln_status":"Analyzed","description":"Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.","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":"2026-07-16","kev_ransomware":false,"epss_score":0.15873,"epss_percentile":0.96887,"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":"2026-09-18T12:21:01.908819+00:00","first_seen":"2026-07-14T17:17:14.257000+00:00","kev_first_seen":"2026-07-16T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":"2026-10-02T03:22:09.438791+00:00","vendors":["microsoft"],"products":["sharepoint_server"],"affected":[{"vendor":"microsoft","product":"sharepoint_server","ranges":["< 16.0.19725.20434","2016","2019"]}]}