CVE-2001-0288

HighCVSS 7.5/10Last modified Jun 16, 2026

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.

Metrics

CVSS 2.0 7.5/10AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://www.cisco.com/warp/public/707/ios-tcp-isn-random-pub.shtmlPatch, Vendor Advisory
http://www.cisco.com/warp/public/707/ios-tcp-isn-random-pub.shtmlPatch, Vendor Advisory

Timeline

Published: May 3, 2001
Last modified: Jun 16, 2026
NVD status: Modified

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