{"id":"CVE-2026-119364","kind":"vulnerability","aliases":["CVE-2026-119364"],"related":[],"title":"ProFTPD: symlink tricks let authenticated FTP users overwrite write-protected files","description":"ProFTPD through 1.3.9e and 1.3.10rc1 through 1.3.10rc4 contains a link-following vulnerability in mod_copy that allows authenticated FTP users to bypass Limit WRITE restrictions via symlinks. Attackers can place a symlink in a writable directory and use SITE COPY or SITE CPTO to overwrite files in write-denied locations.","summary":"ProFTPD's mod_copy module follows symbolic links, so a logged-in FTP user can bypass Limit WRITE rules. An attacker can overwrite files in locations that should be write-denied.","severity":"medium","cvss":6.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ftp","proftpd","runtime","self-hosted"],"not_affected_if":["mod_copy-disabled","no-ftp-accounts"],"how_to_check":"- Run `proftpd -v` to get the installed version and compare it with the affected ranges.\n- Check whether mod_copy is loaded and whether SITE COPY or SITE CPTO is enabled in the proftpd configuration.\n- Review Limit WRITE rules in the proftpd configuration for write-denied directories.","fix":"- ProFTPD through 1.3.9e and 1.3.10rc1 through 1.3.10rc4 are affected; the sources do not name a fixed version.","status":"open","published_at":"2026-10-30T12:16:35+00:00","first_seen_at":"2026-10-30T12:30:23+00:00","triaged_at":"2026-10-30T12:32:52+00:00","updated_at":"2026-10-30T12:32:52+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-10-30T12:32:52Z","model":"claude-haiku-5-5","output":{"fix":"- ProFTPD through 1.3.9e and 1.3.10rc1 through 1.3.10rc4 are affected; the sources do not name a fixed version.","reach":"network","title":"ProFTPD: symlink tricks let authenticated FTP users overwrite write-protected files","impact":"medium","summary":"ProFTPD's mod_copy module follows symbolic links, so a logged-in FTP user can bypass Limit WRITE rules. An attacker can overwrite files in locations that should be write-denied.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["proftpd","ftp","self-hosted"],"confidence":0.7,"fix_status":"unknown","needs_auth":"yes","worst_case":"Authenticated users overwrite files in write-denied server locations","analyst_note":"Confirm the fixed ProFTPD version and whether a patch or setting change is published; the sources only list affected ranges.","how_to_check":"- Run `proftpd -v` to get the installed version and compare it with the affected ranges.\n- Check whether mod_copy is loaded and whether SITE COPY or SITE CPTO is enabled in the proftpd configuration.\n- Review Limit WRITE rules in the proftpd configuration for write-denied directories.","plain_action":"","needs_analyst":true,"not_affected_if":["mod_copy-disabled","no-ftp-accounts"],"who_is_affected":"Servers running ProFTPD versions through 1.3.9e or 1.3.10rc1 through 1.3.10rc4 with mod_copy loaded are exposed. The attacker must hold a valid FTP login and be able to write to a directory where they can create symlinks. Servers without mod_copy or without authenticated FTP users can skip it.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.00074,"input_tokens":4174,"output_tokens":646,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-119364':15A,18A '-2026':14A,17A '1.3.10':63C,66C '1.3.9':60C 'allow':78C 'attack':46B,89C 'authent':5A,79C 'bypass':41B,83C 'contain':68C 'copi':28B,76C,101C 'cpto':104C 'cve':13A,16A 'deni':57B,111C 'directori':97C 'e':61C 'file':12A,49B,107C 'follow':30B,72C 'ftp':6A,19B,38B,80C 'host':24B 'let':4A 'limit':42B,84C 'link':32B,71C 'link-follow':70C 'locat':51B,112C 'log':36B 'logged-in':35B 'mod':27B,75C 'modul':29B 'overwrit':8A,48B,106C 'place':91C 'proftpd':1A,20B,25B,58C 'protect':11A 'rc1':64C 'rc4':67C 'restrict':86C 'rule':44B 'runtim':21B 'self':23B 'self-host':22B 'site':100C,103C 'symbol':31B 'symlink':2A,88C,93C 'trick':3A 'use':99C 'user':7A,39B,81C 'via':87C 'vulner':73C 'writabl':96C 'write':10A,43B,56B,85C,110C 'write-deni':55B,109C 'write-protect':9A","nicknames":[],"mitigations":[],"who_affected":"Servers running ProFTPD versions through 1.3.9e or 1.3.10rc1 through 1.3.10rc4 with mod_copy loaded are exposed. The attacker must hold a valid FTP login and be able to write to a directory where they can create symlinks. Servers without mod_copy or without authenticated FTP users can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"first_public_at":"2026-10-30T12:16:35+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119364","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119364","severity":null,"published_at":"2026-10-30T12:16:35+00:00","modified_at":"2026-10-30T12:16:35+00:00","first_seen_at":"2026-10-30T12:30:23+00:00","fetched_at":"2026-10-30T12:30:23+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}