CVE-2026-42167 Details.
ProFTPD mod_sql - Preauth User Backdoor
Atlas does not check this one. Not a plain web check.
This weakness is not found through ordinary web pages. It needs a different kind of connection to the service. Atlas only runs plain web, DNS and TLS checks, so it does not run this one.
About CVE-2026-42167. What It Means.
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.
Affected Product. What Is Hit.
- Vendor
- proftpd
- Product
- ProFTPD
FAQ
Common Questions.
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.
No. This weakness is not found through ordinary web pages. It needs a different kind of connection to the service. Atlas only runs plain web, DNS and TLS checks, so it does not run this one. The facts about CVE-2026-42167 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-42167 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update ProFTPD to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-42167. Atlas does not run a check for it, so nothing here says whether a particular site is affected.