CVE-2001-0288

high

Description

Cisco switches and routers running IOS 12.1 and earlier produce predictable TCP Initial Sequence Numbers (ISNs), which allows remote attackers to spoof or hijack TCP connections.

References

https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-0288

http://www.cisco.com/warp/public/707/ios-tcp-isn-random-pub.shtml

Details

Source: Mitre, NVD

Published: 2001-05-03

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N