{"id":"CVE-2021-35250","published":"2022-04-25T19:47:54Z","modified":"2024-09-16T23:31:12Z","title":"Directory Transversal Vulnerability in Serv-U 15.3","vendor":"SolarWinds","product":"Serv-U","tier":"core","eol":null,"affectedVersions":[{"vendor":"SolarWinds","product":"Serv-U","versions":[">= 15.3 only, < 15.3 Hotfix 1"]}],"description":{"text":"A researcher reported a Directory Transversal Vulnerability in Serv-U 15.3. This may allow access to files relating to the Serv-U installation and server files. This issue has been resolved in Serv-U 15.3 Hotfix 1.","provenance":"source","from":"CVE.org"},"summary":{"text":"Serv-U 15.3 from SolarWinds contains a directory traversal flaw, classified as improper limitation of a pathname to a restricted directory, that affects the server's file handling. An attacker with network access can exploit it without authentication or user interaction and under a default configuration to read files related to the Serv-U installation and server, with no reported impact on integrity or availability.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-31T12:59:50Z"},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.12804,"percentile":0.96282,"date":"2026-10-30","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2023-12-24","exploitedFirstSeen":"2023-12-24","ransomware":false,"evidence":[{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-12-24&host_type=src&vulnerability=cve-2021-35250","date":"2023-12-24"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-01-22&host_type=src&vulnerability=cve-2021-35250","date":"2024-01-22"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-01-23&host_type=src&vulnerability=cve-2021-35250","date":"2024-01-23"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-01-24&host_type=src&vulnerability=cve-2021-35250","date":"2024-01-24"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-01-27&host_type=src&vulnerability=cve-2021-35250","date":"2024-01-27"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-01-28&host_type=src&vulnerability=cve-2021-35250","date":"2024-01-28"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-01-30&host_type=src&vulnerability=cve-2021-35250","date":"2024-01-30"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-01-31&host_type=src&vulnerability=cve-2021-35250","date":"2024-01-31"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-02-01&host_type=src&vulnerability=cve-2021-35250","date":"2024-02-01"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-02-07&host_type=src&vulnerability=cve-2021-35250","date":"2024-02-07"}],"evidenceTotal":484,"provenance":"source"},"exploited":true,"otx":{"pulseCount":4,"pulses":[{"name":"SCANID: S-KhOoOrXsco8: Thor Lite Linux 64 - Sample Lab Device 2 - incomplete (not enriched)","url":"https://otx.alienvault.com/pulse/67c6bb5aa601e91b1314ff44","created":"2025-03-04"},{"name":"Thor Lite Scan - 10.7.15 - Ubuntu Scan on Archived Files","url":"https://otx.alienvault.com/pulse/664cc3c1938ed0b9abf026a2","created":"2024-05-21"},{"name":"Killing The Bear - Vulnerabilities Cisa Summary Apr 25th  (2022-05-03)","url":"https://otx.alienvault.com/pulse/6271815d5b43a4e4c1dbdd72","created":"2022-05-03"},{"name":"Vulnerability in SolarWinds Serv-U","url":"https://otx.alienvault.com/pulse/624aff4571b336de80d419e1","created":"2022-04-04"}],"provenance":"machine"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"references":[{"url":"https://support.solarwinds.com/SuccessCenter/s/article/Serv-U-15-3-HotFix-1?language=en_US","tags":["x_refsource_MISC"]},{"url":"https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35250","tags":["x_refsource_MISC"]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-21893","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-21893","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2023-04-13","earliestUrl":"https://github.com/rissor41/SolarWinds-CVE-2021-35250","repos":[{"name":"rissor41/SolarWinds-CVE-2021-35250","url":"https://github.com/rissor41/SolarWinds-CVE-2021-35250","stars":9,"created":"2023-04-13"}]},"nuclei":[{"id":"CVE-2021-35250","name":"SolarWinds Serv-U 15.3 - 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