What’s Vulnerable › Vulnerabilities

CVE-2001-0427

• Severity: high (CVSS 7.1 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2001-06-18 · updated 2026-06-16
• Weakness: CWE-20

Description

Cisco VPN 3000 series concentrators before 2.5.2(F) allow remote attackers to cause a denial of service via a flood of invalid login requests to (1) the SSL service, or (2) the telnet service, which do not properly disconnect the user after several failed login attempts.

Affected products

• Cisco Vpn 3000 Concentrator: all versions
• Cisco Vpn 3005 Concentrator: all versions
• Cisco Vpn 3015 Concentrator: all versions
• Cisco Vpn 3030 Concentator: all versions
• Cisco Vpn 3060 Concentrator: all versions
• Cisco Vpn 3080 Concentrator: all versions

References

• http://www.cisco.com/warp/public/707/vpn3k-telnet-vuln-pub.shtml
• http://www.osvdb.org/5643
• https://exchange.xforce.ibmcloud.com/vulnerabilities/6298
• http://www.cisco.com/warp/public/707/vpn3k-telnet-vuln-pub.shtml
• http://www.osvdb.org/5643
• https://exchange.xforce.ibmcloud.com/vulnerabilities/6298

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