CVE-2001-0751

Name: CVE-2001-0751
Creator: NVD / NIST
Published: 2001-10-18T04:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.59%

Last modified Jun 16, 2026

CVE-2001-0751 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.59% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.59%

83.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Cbos	<= 2.3.8

References

http://www.cisco.com/warp/public/707/CBOS-multiple2-pub.htmlPatch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/139
http://www.cisco.com/warp/public/707/CBOS-multiple2-pub.htmlPatch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/139

Timeline

Published: Oct 18, 2001
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2001-0751?

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.

How severe is CVE-2001-0751?

Severity scoring for CVE-2001-0751 is pending analysis. The EPSS model estimates a 2.59% probability of exploitation in the next 30 days.

How do I fix CVE-2001-0751?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2001-0751?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST