PT-2026-35642 · Proftpd · Proftpd

Valtteri Vuorikoski · Published 2026-04-27 · Updated 2026-05-11 · CVE-2026-42167

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions ProFTPD versions prior to 1.3.10rc1

Description A flaw in the mod sql module allows unauthenticated remote attackers to bypass authentication and execute arbitrary code. The issue stems from a lack of protection for SQL query structures, specifically when logging USER requests using expansions such as %U. If the SQL backend supports command execution (for example, COPY TO PROGRAM), an attacker can use a crafted username to break SQL strings and execute OS-level commands. Over 162,000 internet-facing instances are estimated to be at risk.

Recommendations Update to version 1.3.10rc1.

Exploit

Fix

RCE

LPE

SQL injection

Weakness Enumeration

CWE-89

Related Identifiers

BDU:2026-06120

CVE-2026-42167

OESA-2026-2158

OESA-2026-2159

OESA-2026-2264

OESA-2026-2266

PROFTPDCVE_2026_42167

Affected Products

Proftpd

References · 46

• 🔥 https://github.com/ZeroPathAI/proftpd-CVE-2026-42167-poc · Exploit
• https://osv.dev/vulnerability/OESA-2026-2158 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-42167 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-42167 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42167 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2159 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-42167 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-42167 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-44331 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2264 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-06120 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-42167 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2266 · Vendor Advisory
• https://github.com/proftpd/proftpd/commit/af90843baf7dcb8c6be1e5261be2d0b5b5850673 · Note
• https://github.com/proftpd/proftpd/issues/2052 · Note