CVE-2006-4313

Cisco VPN 3000 Series FTP Commands - File Modification

Title source: manual
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2006-4313. PoCs published by aushack, including Metasploit module auxiliary/admin/networking/cisco_vpn_3000_ftp_bypass.

AI-analyzed exploit summary This Metasploit module exploits an authentication bypass vulnerability in Cisco VPN Concentrator 3000 series via FTP commands (MKD, RMD, SIZE) to create, verify, and delete directories without authentication. It confirms the vulnerability by checking server responses.

Description

Multiple unspecified vulnerabilities in Cisco VPN 3000 series concentrators before 4.1, 4.1.x up to 4.1(7)L, and 4.7.x up to 4.7(2)F allow attackers to execute the (1) CWD, (2) MKD, (3) CDUP, (4) RNFR, (5) SIZE, and (6) RMD FTP commands to modify files or create and delete directories via unknown vectors.

Exploits (1)

metasploit WORKING POC
by aushack · rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/admin/networking/cisco_vpn_3000_ftp_bypass.rb

This Metasploit module exploits an authentication bypass vulnerability in Cisco VPN Concentrator 3000 series via FTP commands (MKD, RMD, SIZE) to create, verify, and delete directories without authentication. It confirms the vulnerability by checking server responses.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: Cisco VPN Concentrator 3000 series
No auth needed
Prerequisites: Network access to the target's FTP service (port 21)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (8)

Core 8
Core References
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2006/3368
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/28138
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://securitytracker.com/id?1016737
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/19680
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/28139
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/28539
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/21617

Scores

EPSS 0.6766
EPSS Percentile 98.6%

Details

Status published
Products (11)
cisco/vpn_3000_concentrator_series_software 4.0
cisco/vpn_3000_concentrator_series_software 4.0.1
cisco/vpn_3000_concentrator_series_software 4.0.5.b
cisco/vpn_3000_concentrator_series_software 4.1.5.b
cisco/vpn_3000_concentrator_series_software 4.1.7.a
cisco/vpn_3000_concentrator_series_software 4.1.7.b
cisco/vpn_3000_concentrator_series_software 4.1.7.l
cisco/vpn_3000_concentrator_series_software 4.7
cisco/vpn_3000_concentrator_series_software 4.7.1
cisco/vpn_3000_concentrator_series_software 4.7.1.f
... and 1 more
Published Aug 23, 2006
Tracked Since Feb 18, 2026