{"cve_id":"CVE-2026-20045","published":"2026-01-21T17:16:08.077000+00:00","last_modified":"2026-06-17T10:16:58.097000+00:00","vuln_status":"Analyzed","description":"A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM &amp; Presence Service (Unified CM IM&amp;P), Cisco Unity Connection, and Cisco Webex Calling Dedicated Instance could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device.&nbsp;\r\n\r\nThis vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending a sequence of crafted HTTP requests to the web-based management interface of an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root.&nbsp;\r\nNote: Cisco has assigned this security advisory a Security Impact Rating (SIR) of Critical rather than High as the score indicates. The reason is that exploitation of this vulnerability could result in an attacker elevating privileges to root.","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-94"],"in_kev":true,"kev_date_added":"2026-01-21","kev_ransomware":false,"epss_score":0.04541,"epss_percentile":0.9157,"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":"2026-09-18T11:54:48.696261+00:00","first_seen":"2026-01-21T17:16:08.077000+00:00","kev_first_seen":"2026-01-21T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["cisco"],"products":["unified_communications_manager","unified_communications_manager_im_and_presence_service","unity_connection"],"affected":[{"vendor":"cisco","product":"unified_communications_manager","ranges":["≥ 12.5 and < 14su5","≥ 15.0 and ≤ 15su3a"]},{"vendor":"cisco","product":"unified_communications_manager_im_and_presence_service","ranges":["≥ 12.5 and < 14su5","≥ 15.0 and ≤ 15su3a"]},{"vendor":"cisco","product":"unity_connection","ranges":["≥ 12.5 and < 14su5","≥ 15.0 and ≤ 15su3"]}]}