What’s Vulnerable › Vulnerabilities

CVE-2001-0751

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2001-10-18 · updated 2026-06-16

Description

Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence Numbers (ISN), which allows remote attackers to spoof or hijack TCP connections.

Affected products

• Cisco Cbos: through 2.3.8

References

• http://www.cisco.com/warp/public/707/CBOS-multiple2-pub.html
• https://exchange.xforce.ibmcloud.com/vulnerabilities/139
• http://www.cisco.com/warp/public/707/CBOS-multiple2-pub.html
• https://exchange.xforce.ibmcloud.com/vulnerabilities/139

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