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

CVE-2001-0288

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • Cisco Systems, Inc./Cisco iOS2 versions
    cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*range: <=12.1
    • (no CPE)range: <= 12.1

Patches

Vulnerability mechanics

References

1

News mentions

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