Unrated severityNVD Advisory· Published May 3, 2001· Updated Apr 16, 2026

CVE-2001-0288

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 products

Cisco Systems, Inc./Cisco iOS
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
Range: <=12.1

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.cisco.com/warp/public/707/ios-tcp-isn-random-pub.shtmlnvdPatchVendor Advisory

News mentions

No linked articles in our index yet.

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