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.

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This report contains official claims from a government or institutional source and may not be independently verified.

Threat HighOfficial ClaimGovernmentConf ConfirmedUnited States · North AmericaPublishedCISA

Original publisher

CISA

Original source URL

http://www.proftpd.org/

Source country

United States

Reporting region

North America

Language

Institution

CISA

Published (UTC)

Oct 8, 2026, 12:00 AM

Ingested (UTC)

Oct 16, 2026, 3:02 PM

Verification

Official Claim

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CVE-2015-3306: ProFTPD Improper Access Control Vulnerability
Vendor/project: ProFTPD
Product: ProFTPD
Date added to KEV: 2026-10-08
Due date: 2026-10-11
Known ransomware use: Unknown
CWEs: CWE-284
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.

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.

Notes:
This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: http://www.proftpd.org/ ; https://lists.debian.org/debian-security-announce/2015/msg00154.html ; https://lists.opensuse.org/archives/list/updates@lists.opensuse.org/message/WE6YZRG5UVXMGQ7IVDRYBPIWV4M6UUGM/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2015-3306
CISA KEV catalog entry for CVE-2015-3306
Original source: http://www.proftpd.org/

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