CVE-2026-119567
vsftpd through 3.0.5 cmds_denied Bypass via RFC 775 Command Aliases
- State
- Published
- Severity
- 2.3 Low
- Published
- Oct 30, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 30, 2026
Description
vsftpd through 3.0.5 contains an access control bypass vulnerability that allows authenticated FTP users to execute denied commands by issuing RFC 775 X-prefixed aliases. The cmds_denied check in process_post_login() compares literal tokens, so attackers can send XRMD, XMKD, XCWD, XPWD, or XCUP to perform blocked operations like deleting directories.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.3 Low | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 3.1 Low | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-184 Incomplete List of Disallowed Inputs
Affected Products
| Product | Versions |
|---|---|
vsftpdvsftpd |
|
References
- https://abraxaslabs.tech/research/vsftpd-cmds-denied-aliasthird-party-advisory
- https://security.appspot.com/vsftpd.htmlproduct
- VulnCheck Advisory: vsftpd through 3.0.5 cmds_denied Bypass via RFC 775 Command Aliasesthird-party-advisory
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