{"id":"CVE-2026-115338","kind":"vulnerability","aliases":["CVE-2026-115338"],"related":[],"title":"Progress WS_FTP Server: unencrypted connections let a network attacker read or alter traffic","description":"Insufficient protection of communications in Progress WS_FTP Server versions prior to 2025.0.5 could allow a network attacker to intercept sensitive information or modify requests when unencrypted connections are used.","summary":"WS_FTP Server before 2025.0.5 does not adequately protect communications when unencrypted connections are used. A network attacker can intercept sensitive information in transit or modify requests.","severity":"high","cvss":8.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["file-transfer","self-hosted","vendor","ws_ftp_server"],"not_affected_if":["encrypted-only-connections","patched-version"],"how_to_check":"- Check the installed WS_FTP Server version against `2025.0.5`\n- Check whether plain FTP or HTTP connections are enabled on the server, not only TLS-protected ones","fix":"- WS_FTP Server: move to `2025.0.5` or later","status":"open","published_at":"2026-11-09T17:17:11+00:00","first_seen_at":"2026-11-09T17:27:38+00:00","triaged_at":"2026-11-09T17:28:44+00:00","updated_at":"2026-11-09T17:28:44+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-11-09T17:28:44Z","model":"claude-haiku-5-5","output":{"fix":"- WS_FTP Server: move to `2025.0.5` or later","reach":"network","title":"Progress WS_FTP Server: unencrypted connections let a network attacker read or alter traffic","impact":"high","summary":"WS_FTP Server before 2025.0.5 does not adequately protect communications when unencrypted connections are used. A network attacker can intercept sensitive information in transit or modify requests.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["ws_ftp_server","file-transfer","self-hosted"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"network attacker reads sensitive transfers and alters requests","analyst_note":"Confirm from the Progress advisory which unencrypted connection modes are affected and whether the fix is 2025.0.5 across all branches.","how_to_check":"- Check the installed WS_FTP Server version against `2025.0.5`\n- Check whether plain FTP or HTTP connections are enabled on the server, not only TLS-protected ones\n- unknown for other settings, as the sources do not say which configuration is required","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["encrypted-only-connections","patched-version"],"who_is_affected":"WS_FTP Server instances running versions before 2025.0.5 that accept unencrypted connections are exposed. The sources do not say whether TLS-only deployments are affected, so teams enforcing encrypted transport may have less exposure. Teams running current versions can skip it.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000736,"input_tokens":4524,"output_tokens":568,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-115338':17A,20A '-2026':16A,19A '2025.0.5':35B,70C 'adequ':38B 'allow':72C 'alter':13A 'attack':10A,48B,75C 'communic':40B,61C 'connect':6A,43B,85C 'could':71C 'cve':15A,18A 'file':22B 'file-transf':21B 'ftp':3A,29B,32B,65C 'host':26B 'inform':52B,79C 'insuffici':58C 'intercept':50B,77C 'let':7A 'modifi':56B,81C 'network':9A,47B,74C 'prior':68C 'progress':1A,63C 'protect':39B,59C 'read':11A 'request':57B,82C 'self':25B 'self-host':24B 'sensit':51B,78C 'server':4A,30B,33B,66C 'traffic':14A 'transfer':23B 'transit':54B 'unencrypt':5A,42B,84C 'use':45B,87C 'vendor':27B 'version':67C 'ws':2A,28B,31B,64C","nicknames":[],"mitigations":[],"who_affected":"WS_FTP Server instances running versions before 2025.0.5 that accept unencrypted connections are exposed. The sources do not say whether TLS-only deployments are affected, so teams enforcing encrypted transport may have less exposure. Teams running current versions can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["filetransfer","high","selfhosted","vendor","wsftpserver"],"campaign_type":null,"search_a":"'-115338':17A,20A '-2026':16A,19A 'alter':13A 'attack':10A 'connect':6A 'cve':15A,18A 'ftp':3A 'let':7A 'network':9A 'progress':1A 'read':11A 'server':4A 'traffic':14A 'unencrypt':5A 'ws':2A","search_b":"'2025.0.5':35B 'adequ':38B 'attack':48B 'communic':40B 'connect':43B 'file':22B 'file-transf':21B 'ftp':29B,32B 'host':26B 'inform':52B 'intercept':50B 'modifi':56B 'network':47B 'protect':39B 'request':57B 'self':25B 'self-host':24B 'sensit':51B 'server':30B,33B 'transfer':23B 'transit':54B 'unencrypt':42B 'use':45B 'vendor':27B 'ws':28B,31B","search_c":"'2025.0.5':70C 'allow':72C 'attack':75C 'communic':61C 'connect':85C 'could':71C 'ftp':65C 'inform':79C 'insuffici':58C 'intercept':77C 'modifi':81C 'network':74C 'prior':68C 'progress':63C 'protect':59C 'request':82C 'sensit':78C 'server':66C 'unencrypt':84C 'use':87C 'version':67C 'ws':64C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-09T17:17:11+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"security@progress.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-115338","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115338","severity":null,"published_at":"2026-11-09T17:17:11+00:00","modified_at":"2026-11-09T17:17:11+00:00","first_seen_at":"2026-11-09T17:27:38+00:00","fetched_at":"2026-11-09T17:27:38+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}