10.0 RCE-capable improper access control in widely deployed ProFTPD FTP daemon; on CISA KEV and enables server takeover.
CVE-2015-3306
ProFTPD mod_copy allows remote arbitrary file read/write via SITE CPFR/CPTO
Is CVE-2015-3306 being exploited?
Yes. CVE-2015-3306 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2015-3306?
CVE-2015-3306 is rated Critical with a CVSS score of 10.0. 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-2015-3306?
Yes. A fix has been recorded for CVE-2015-3306. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2015-3306 affect?
CVE-2015-3306 affects ProFTPD 1.3.5, mod_copy module. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2015-3306?
Upgrade ProFTPD to patched version or disable mod_copy; block FTP access if unpatchable.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote arbitrary file read/write via SITE CPFR/CPTO; enables data exfiltration, file overwrite, RCE and full server compromise.
Immediate action required