CVEvulnerability

CVE-2001-0288

7.5 HIGH Published 2001-05-03 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2001-05-03
Last modified
2026-06-16
Assigner
[email protected]
CVSS 2.0 ([email protected])
7.5 HIGH — AV: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.

Affected configurations

• cisco ios (<= 12.1)

References