CVE-2026-42167
ProFTPD mod_sql RCE via crafted username (%U) and SQL backend commands.
Is CVE-2026-42167 being exploited?
Not confirmed. CVE-2026-42167 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 7.4% probability of exploitation in the next 30 days.
How severe is CVE-2026-42167?
CVE-2026-42167 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-42167?
Yes. A fix has been recorded for CVE-2026-42167. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42167 affect?
CVE-2026-42167 affects ProFTPD < 1.3.10rc1, Linux/UNIX servers running ProFTPD with mod_sql. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-42167?
Upgrade to ProFTPD 1.3.10rc1 or newer
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution on ProFTPD servers via mod_sql; attacker can execute OS commands.
Immediate action required
- affected>= 1.3.7b and < 1.3.9a
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.