CVE-2015-3306: Proftpd | defend.network

What is CVE-2015-3306?

The mod_copy module in ProFTPD 1.3.5 allows remote attackers to read and write to arbitrary files via the site cpfr and site cpto commands.

CVSS10 NVD 3.1

SeverityCRITICAL

Exploitation In the wild In CISA KEV

EPSS97% · P100

Triage statusActive Exploit

ActionPatch immediately

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWECWE-284

NVD published2015-05-18

NVD last modified2026-10-09

Timeline

2015-05-18Published to the U.S. National Vulnerability Database (NVD)
2026-10-08Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
2026-10-09NVD record last updated
2026-10-11CISA federal remediation deadline (BOD 22-01)

CISA Known Exploited Vulnerability

ProFTPD Improper Access Control Vulnerability

Added to KEV2026-10-08

Federal patch deadline2026-10-11

Known ransomware useUnknown

Affected product

Proftpd

Remediation Steps

Apply the vendor security update for ProFTPD ProFTPD as a priority.
Restrict network exposure of the affected service to trusted sources until patched.
Review logs and detections for indicators of exploitation.
Confirm fixed versions against the official vendor advisory before deploying.

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 1 of October 2026 (October 5 – 11)

Browse all tracked CVEs in the defend.network CVE database →

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.