{"cve_id":"CVE-2026-45659","published":"2026-05-22T23:16:56.273000+00:00","last_modified":"2026-07-23T11:10:00.120000+00:00","vuln_status":"Analyzed","description":"Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","base_score":8.8,"base_severity":"HIGH","attack_vector":"NETWORK","privileges_req":"LOW","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-502"],"in_kev":true,"kev_date_added":"2026-07-01","kev_ransomware":true,"epss_score":0.80242,"epss_percentile":0.99619,"cap_rule_version":"0.1.1","stage":"EXECUTION","req_access":"USER","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T12:14:49.757152+00:00","first_seen":"2026-05-22T23:16:56.273000+00:00","kev_first_seen":"2026-07-01T00:00:00+00:00","novelty_score":60.99,"novelty_reasons":["EPSS_SPIKE","HIGH_LEVERAGE_STEPPING_STONE","REACHES_TERMINAL","RAISES_REACH_COMMON_PRODUCT"],"novelty_at":"2026-11-02T03:21:44.260683+00:00","vendors":["microsoft"],"products":["sharepoint_server"],"affected":[{"vendor":"microsoft","product":"sharepoint_server","ranges":["< 16.0.19725.20280","2016","2019"]}]}