{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90871","assignerOrgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","state":"PUBLISHED","assignerShortName":"ProgressSoftware","dateReserved":"2026-09-14T06:10:04.370Z","datePublished":"2026-10-29T15:56:34.762Z","dateUpdated":"2026-10-29T15:56:34.762Z"},"containers":{"cna":{"providerMetadata":{"orgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","shortName":"ProgressSoftware","dateUpdated":"2026-10-29T15:56:34.762Z"},"title":"Path Traversal Leading to File Deletion in Ad Hoc Transfer and Web Transfer in Progress WS_FTP Server","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"},{"lang":"en","cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","type":"CWE"}]}],"impacts":[{"descriptions":[{"lang":"en","value":"Path Traversal - could allow file deletion outside intended directory boundaries, subject to the affected account’s permissions."}]}],"affected":[{"vendor":"Progress Software","product":"WS_FTP Server","platforms":["Windows"],"versions":[{"status":"affected","version":"0","lessThan":"2024.0.7","versionType":"custom"},{"status":"affected","version":"0","lessThan":"2025.0.4","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"Improper limitation of a pathname to a restricted directory in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow an unauthenticated attacker to affect files outside the intended directory.","supportingMedia":[{"type":"text/html","base64":false,"value":"Improper limitation of a pathname to a restricted directory in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow an unauthenticated attacker to affect files outside the intended directory."}]}],"references":[{"url":"https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE","baseSeverity":"MEDIUM","baseScore":5.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}}],"workarounds":[{"lang":"en","value":"By default the affected anonymous account can only delete files it previously created; ensure it is not granted broader write/delete permissions than required on Ad Hoc Transfer and Web Transfer related directories. Contact Progress Software Technical Support for guidance on available mitigations.","supportingMedia":[{"type":"text/html","base64":false,"value":"<div>By default the affected anonymous account can only delete files it previously created; ensure it is not granted broader write/delete permissions than required on Ad Hoc Transfer and Web Transfer related directories. Contact Progress Software Technical Support for guidance on available mitigations.</div>"}]}],"credits":[{"lang":"en","value":"Momen Elmady (0xmatrix)","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}}}}