{"id":"CVE-2026-90864","title":"Host Administrator Path Containment Bypass in Progress WS_FTP Server","summary":"A path traversal vulnerability in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow a delegated Host Administrator to access or modify files outside their authorized scope.","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-22","CWE-434"],"vendor":"Progress Software","product":"WS_FTP Server","affected":["ws_ftp_server < 2024.0.7","ws_ftp_server < 2025.0.4"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-30T03:56:39.496575Z"},"published":"2026-10-29","updated":"2026-10-30","sourceUpdated":"2026-10-30T17:18:24.999Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90864","references":[{"url":"https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view"}],"tags":["cve.org"],"epss":0.00479,"epssPercentile":0.41462,"ingestedAt":"2026-11-05T16:24:31.174Z","slug":"CVE-2026-90864","body":"## Overview\n\nA path traversal vulnerability in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow a delegated Host Administrator to access or modify files outside their authorized scope.\n\n## Affected\n\n- `ws_ftp_server < 2024.0.7`\n- `ws_ftp_server < 2025.0.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nLimit delegated administrative privileges to trusted personnel. Review folder configurations and account permissions to ensure access remains within authorized boundaries. Contact Progress Software Technical Support for guidance on available mitigations.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}