How severe is CVE-2001-0751?

CVE-2001-0751 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-0751 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0751?

CVE-2001-0751 affects Cisco Cbos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0751?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2001-0751 published?

CVE-2001-0751 was published on 2001-10-18 and last updated on 2026-06-16.

CVE-2001-0751

CVE-2001-0751 is a high-severity vulnerability in Cisco Cbos with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Cbos
Published: 2001-10-18
Last modified: 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.

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?: CVE-2001-0751 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-0751 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0751?: CVE-2001-0751 affects Cisco Cbos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0751?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2001-0751 published?: CVE-2001-0751 was published on 2001-10-18 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:cisco:cbos:*:*:*:*:*:*:*:*

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