VULNERABILITY INTELLIGENCE

CVE-2001-0288

CVSS score7.5 HIGH
EPSS probability5.41%
CISA KEVNot currently listed
Published2001-05-03
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:P/A:P

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.

Primary references