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CVE-2015-3306VulnerabilityPublished 10/08/2026Updated 10/24/2026

CVE-2015-3306: ProFTPD Improper Access Control Vulnerability

Affects ProFTPD ProFTPDSource CISA KEV

Severity
High

No CVSS score published yet

Exploitation

Actively exploited – in CISA KEV since 10/08/2026

KEV deadline
10/11/2026
EPSS
99.5% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Description

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.

Weaknesses

References

Track ProFTPD ProFTPD with alerts and the API. See plans

Added 10/24/2026 · updated 10/24/2026