CVE entry · CVE-2015-3306
CVE-2015-3306: ProFTPD Improper Access Control Vulnerability
ProFTPD contains an improper access control vulnerability that could allow remote attackers to read and write to arbitrary files via the site cpfr and site cpto commands.
- Actively exploited: added to CISA’s KEV catalog on October 8, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: October 11, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes ProFTPD, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (lists.debian.org)
- Vendor advisory or reference cited by CISA (lists.opensuse.org)
- NVD entry (NIST)
- CISA KEV catalog