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CVE-2001-0427

Published: Sep 18, 2001Updated: Apr 16, 2026 Sources: CVE List NVDCWE-20
NVD MITRE
7.1CVSSHIGH
EPSS Score
2.5%
Top 17.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:MAu:NC:NI:NA:C
Exploitability
AV:NAccess Vector
Network
AC:MAccess Complexity
Medium
Au:NAuthentication
None
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:CAvailability
Complete
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Weaknesses

CWE-20

Affected Products

vpn 3000 concentratorciscoNetworking Infrastructure
vpn 3005 concentratorciscoNetworking Infrastructure
vpn 3015 concentratorciscoNetworking Infrastructure
vpn 3030 concentatorciscoNetworking Infrastructure
vpn 3060 concentratorciscoNetworking Infrastructure
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
and 2 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
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References

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

Timeline

Published
Sep 18, 2001
Last Updated
Apr 16, 2026

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