How severe is CVE-2001-0056?

CVE-2001-0056 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-0056 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0056?

CVE-2001-0056 affects Cisco Broadband Operating System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0056?

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-2001-0056 published?

CVE-2001-0056 was published on 2001-02-16 and last updated on 2026-06-16.

CVE-2001-0056

CVE-2001-0056 is a high-severity vulnerability in Cisco Broadband Operating System 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: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Broadband Operating System
Published: 2001-02-16
Last modified: 2026-06-16

Description

The Cisco Web Management interface in routers running CBOS 2.4.1 and earlier does not log invalid logins, which allows remote attackers to guess passwords without detection.

Frequently asked questions

What is CVE-2001-0056?: The Cisco Web Management interface in routers running CBOS 2.4.1 and earlier does not log invalid logins, which allows remote attackers to guess passwords without detection.
How severe is CVE-2001-0056?: CVE-2001-0056 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-0056 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0056?: CVE-2001-0056 affects Cisco Broadband Operating System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0056?: 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-2001-0056 published?: CVE-2001-0056 was published on 2001-02-16 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:cisco:broadband_operating_system:*:*:*:*:*:*:*:*

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CVE-2001-0057 — Medium (CVSS 5.0): Cisco 600 routers running CBOS 2.4.1 and earlier allow remote attackers to cause a denial of service via a large ICMP…
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