{"id":"CVE-2026-90863","kind":"vulnerability","aliases":["CVE-2026-90863"],"related":[],"title":"WS_FTP Server: delegated host administrators can run commands with elevated privileges","description":"Missing authorization in the administrative interface of Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow a delegated Host Administrator to exceed their authorized scope, potentially enabling arbitrary command execution with elevated privileges and complete compromise of the underlying server.","summary":"WS_FTP Server on Windows lacks an authorization check in its administrative interface, so a delegated Host Administrator can act beyond their assigned scope. The sources say this could allow arbitrary command execution with elevated privileges and full compromise of the server.","severity":"critical","cvss":9.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["file-transfer","runtime","windows","ws_ftp_server"],"not_affected_if":["no-delegated-host-admins","non-windows-install"],"how_to_check":"- Check the installed WS_FTP Server version in the product's About or admin page; it is affected below `2024.0.7` and below `2025.0.4`\n- List accounts holding the Host Administrator role and confirm they are only trusted staff","fix":"- WS_FTP Server versions below `2024.0.7` and below `2025.0.4`: move to the fixed release for your branch (`2024.0.7` or `2025.0.4`)","status":"open","published_at":"2026-10-29T16:20:04+00:00","first_seen_at":"2026-10-29T16:26:01+00:00","triaged_at":"2026-10-29T16:27:49+00:00","updated_at":"2026-10-29T16:27:49+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-29T16:27:49Z","model":"claude-haiku-5-5","output":{"fix":"- WS_FTP Server versions below `2024.0.7` and below `2025.0.4`: move to the fixed release for your branch (`2024.0.7` or `2025.0.4`)","reach":"unknown","title":"WS_FTP Server: delegated host administrators can run commands with elevated privileges","impact":"high","summary":"WS_FTP Server on Windows lacks an authorization check in its administrative interface, so a delegated Host Administrator can act beyond their assigned scope. The sources say this could allow arbitrary command execution with elevated privileges and full compromise of the server.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["ws_ftp_server","windows","file-transfer"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"Attacker runs commands as elevated user, taking over the server","analyst_note":"Confirm the attack path from the NVD entry and the vendor advisory, and whether the Host Administrator role is needed to reach the flaw.","how_to_check":"- Check the installed WS_FTP Server version in the product's About or admin page; it is affected below `2024.0.7` and below `2025.0.4`\n- List accounts holding the Host Administrator role and confirm they are only trusted staff","plain_action":"","needs_analyst":true,"not_affected_if":["non-windows-install","no-delegated-host-admins"],"who_is_affected":"Only Windows installations of WS_FTP Server prior to 2024.0.7 and 2025.0.4 are described as affected. The exposure depends on the delegated Host Administrator role, so a server with no delegated host administrators is less exposed, though the sources do not say how much less. unknown whether the flaw is reachable from the internet by default.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000735,"input_tokens":4139,"output_tokens":643,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-90863':15A,18A '2024.0.7':84C '2025.0.4':86C 'act':46B 'administr':6A,38B,44B,73C,94C 'allow':56B,90C 'arbitrari':57B,102C 'assign':49B 'author':34B,70C,98C 'beyond':47B 'check':35B 'command':9A,58B,103C 'complet':109C 'compromis':65B,110C 'could':55B,89C 'cve':13A,16A 'deleg':4A,42B,92C 'elev':11A,61B,106C 'enabl':101C 'exceed':96C 'execut':59B,104C 'file':20B 'file-transf':19B 'ftp':2A,25B,28B,79C 'full':64B 'host':5A,43B,93C 'interfac':39B,74C 'lack':32B 'miss':69C 'potenti':100C 'prior':82C 'privileg':12A,62B,107C 'progress':76C 'run':8A 'runtim':22B 'say':53B 'scope':50B,99C 'server':3A,26B,29B,68B,80C,114C 'softwar':77C 'sourc':52B 'transfer':21B 'under':113C 'version':81C 'window':23B,31B,88C 'ws':1A,24B,27B,78C","nicknames":[],"mitigations":[],"who_affected":"Only Windows installations of WS_FTP Server prior to 2024.0.7 and 2025.0.4 are described as affected. The exposure depends on the delegated Host Administrator role, so a server with no delegated host administrators is less exposed, though the sources do not say how much less. unknown whether the flaw is reachable from the internet by default.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"first_public_at":"2026-10-29T16:20:04+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","cvss_by":"security@progress.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-90863","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90863","severity":null,"published_at":"2026-10-29T16:20:04+00:00","modified_at":"2026-10-29T16:24:53+00:00","first_seen_at":"2026-10-29T16:26:01+00:00","fetched_at":"2026-10-29T16:26:01+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}