CVE

CVE-2026-42167

8.1

CVSShigh

Exploitable remotely over the internet · no authentication required.

Description

mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows commands (e.g., COPY TO PROGRAM).

Attack Vector

Network

Privileges Req.

None

User Interaction

None

proftpd

Updated Nov 10, 2026View on NVD →

S4E scanner

criticalNetwork Vulnerabilities~10 seconds

ProFTPD mod_sql - Preauth User Backdoor

ProFTPD mod_sql before 1.3.10rc1 contains a remote code execution caused by unsafe username handling with SQL backend commands in USER request logging expansions, letting remote attackers execute arbitrary code, exploit requires SQL backend allowing commands. References: https://github.com/ZeroPathAI/proftpd-CVE-2026-42167-poc https://zeropath.com/blog/proftpd-cve-2026-42167-auth-bypass-privesc-rce Remediation: Upgrade to version 1.3.10rc1 or later.

Used 18 times · 9 assets checked · domain, subdomain, ipv4

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CVE history: proftpd

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