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CVE-2001-0751

Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence...

7.5 HighPublic exploit

CVE-2001-0751 is a high vulnerability (CVSS 7.5) in Cisco Cbos, published October 18, 2001. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.59%, the 85th percentile. No source names a fixed version.

What does this mean?
Severity
7.5 HighCVSS 2.0, NVD
Exploit chance
2.59%EPSS, 85th percentile
Exploitation
None known1 public exploit
Fixed in
No fix listedNo source names one

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.

Exploit likelihood

2.59%Up 1.5 points since Feb 4, 2022
90%50%10%1%

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBLinux Kernel 2.2 - Predictable TCP Initial Sequence Number1999-09-27

What each source reports

NVD Score used7.5

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.

Record
CVE-2001-0751
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated
2026-11-02
CVE ListNo score

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.

Record
CVE-2001-0751
Updated
2026-11-02
EUVDEUVD-2001-0736No score

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.

Record
EUVD-2001-0736
Updated
2026-11-03
GitHub AdvisoriesGHSA-v59f-9wq8-3hggNo score

Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence...

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.

Record
GHSA-v59f-9wq8-3hgg
Updated
2026-11-02

History

History
RecordedChangedSources
facts
aliasesEUVD
first indexedCVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

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