ProFTPD SITE CPFR/CPTO Commands Enable Unauthenticated Remote File Read and Write; CISA KEV Mandate Requires Covered Entities to Act by October 11th

Last refreshed2026-10-09

Status: KEV | Advisory ID: CVE-2015-3306

Key Details

CVE	CVE-2015-3306
Vulnerability Name	ProFTPD Improper Access Control Vulnerability
CVSS Score / Version	10.0 (Critical) / CVSS v3.1
Updated	2026-10-09
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	ProFTPD ProFTPD and suse linux_enterprise_server
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-284 (Improper Access Control)
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-10-08.
Exploitation prediction (EPSS)	98.03% probability of exploitation in the next 30 days (100% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline	2026-10-11 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
ProFTPD	ProFTPD
suse	linux_enterprise_server

Vendor

Product

Affected Versions

Patch Status

ProFTPD

suse

linux_enterprise_server

Subsystems	General OT
Sectors	Multiple

What to Know

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.

What to Do

Monitor ProFTPD's and suse's web pages for any future patch releases.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2015-3306
CVE	https://www.cve.org/CVERecord?id=CVE-2015-3306

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2015-3306

CVE

https://www.cve.org/CVERecord?id=CVE-2015-3306

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-10-08
Required Action Due Date	2026-10-11
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.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-10-08

Required Action Due Date

2026-10-11

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.