{"api_version":"1","generated_at":"2026-10-29T23:21:16+00:00","cve":"CVE-2026-90871","urls":{"html":"https://cve.report/CVE-2026-90871","api":"https://cve.report/api/cve/CVE-2026-90871.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90871","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90871"},"summary":{"title":"Path Traversal Leading to File Deletion in Ad Hoc Transfer and Web Transfer in Progress WS_FTP Server","description":"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.","state":"PUBLISHED","assigner":"ProgressSoftware","published_at":"2026-10-29 16:20:05","updated_at":"2026-10-29 16:24:53"},"problem_types":["CWE-22","CWE-73","CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","CWE-73 CWE-73: External Control of File Name or Path"],"metrics":[{"version":"3.1","source":"security@progress.com","type":"Secondary","score":"5.3","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"5.3","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"}}],"references":[{"url":"https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view","name":"https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view","refsource":"security@progress.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90871","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90871","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Progress Software","product":"WS_FTP Server","version":"affected 2024.0.7 custom","platforms":["Windows"]},{"source":"CNA","vendor":"Progress Software","product":"WS_FTP Server","version":"affected 2025.0.4 custom","platforms":["Windows"]}],"timeline":[],"solutions":[],"workarounds":[{"source":"CNA","title":"","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.","time":"","lang":"en"}],"exploits":[],"credits":[{"source":"CNA","value":"Momen Elmady (0xmatrix)","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","platforms":["Windows"],"product":"WS_FTP Server","vendor":"Progress Software","versions":[{"lessThan":"2024.0.7","status":"affected","version":"0","versionType":"custom"},{"lessThan":"2025.0.4","status":"affected","version":"0","versionType":"custom"}]}],"credits":[{"lang":"en","type":"finder","value":"Momen Elmady (0xmatrix)"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","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."}],"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."}],"impacts":[{"descriptions":[{"lang":"en","value":"Path Traversal - could allow file deletion outside intended directory boundaries, subject to the affected account’s permissions."}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"},{"cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-29T15:56:34.762Z","orgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","shortName":"ProgressSoftware"},"references":[{"tags":["vendor-advisory"],"url":"https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view"}],"source":{"discovery":"EXTERNAL"},"title":"Path Traversal Leading to File Deletion in Ad Hoc Transfer and Web Transfer in Progress WS_FTP Server","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","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>"}],"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."}],"x_generator":{"engine":"Vulnogram 0.2.0"}}},"cveMetadata":{"assignerOrgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","assignerShortName":"ProgressSoftware","cveId":"CVE-2026-90871","datePublished":"2026-10-29T15:56:34.762Z","dateReserved":"2026-09-14T06:10:04.370Z","dateUpdated":"2026-10-29T15:56:34.762Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-29 16:20:05","lastModifiedDate":"2026-10-29 16:24:53","problem_types":["CWE-22","CWE-73","CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","CWE-73 CWE-73: External Control of File Name or Path"],"metrics":{"cvssMetricV31":[{"source":"security@progress.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90871","Ordinal":"1","Title":"Path Traversal Leading to File Deletion in Ad Hoc Transfer and W","CVE":"CVE-2026-90871","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90871","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Path Traversal Leading to File Deletion in Ad Hoc Transfer and W"}]}}}