CVE-2026-119567

LOW 3.1

vsftpd through 3.0.5 cmds_denied Bypass via RFC 775 Command Aliases

CVSS Score

3.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-184
Vendor	vsftpd
Product	vsftpd
Published	Oct 30, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

vsftpd / vsftpd

0 ≤ 3.0.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

abraxaslabs.tech: https://abraxaslabs.tech/research/vsftpd-cmds-denied-alias security.appspot.com: https://security.appspot.com/vsftpd.html vulncheck.com: https://www.vulncheck.com/advisories/vsftpd-through-3.0.5-cmds-denied-bypass-via-rfc-775-command-aliases

Credits

Abraxas Labs