Cisco IOS 12.2(15) and earlier allows remote attackers to cause a denial of service (refused VTY (virtual terminal) connections), via a crafted TCP connection to the Telnet or reverse Telnet port.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17131
http://www.kb.cert.org/vuls/id/384230
http://www.cisco.com/warp/public/707/cisco-sa-20040827-telnet.shtml
Source: Mitre, NVD
Published: 2004-12-31
Updated: 2025-04-03
Known Exploited Vulnerability (KEV)
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.02515