How severe is CVE-2001-0566?

CVE-2001-0566 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2001-0566 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0566?

CVE-2001-0566 affects Cisco Catalyst 2900. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0566?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2001-0566 published?

CVE-2001-0566 was published on 2001-08-14 and last updated on 2026-06-16.

CVE-2001-0566

CVE-2001-0566 is a medium-severity vulnerability in Cisco Catalyst 2900 with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Catalyst 2900
Published: 2001-08-14
Last modified: 2026-06-16

Description

Cisco Catalyst 2900XL switch allows a remote attacker to create a denial of service via an empty UDP packet sent to port 161 (SNMP) when SNMP is disabled.

Frequently asked questions

What is CVE-2001-0566?: Cisco Catalyst 2900XL switch allows a remote attacker to create a denial of service via an empty UDP packet sent to port 161 (SNMP) when SNMP is disabled.
How severe is CVE-2001-0566?: CVE-2001-0566 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2001-0566 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0566?: CVE-2001-0566 affects Cisco Catalyst 2900. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0566?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-0566 published?: CVE-2001-0566 was published on 2001-08-14 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:h:cisco:catalyst_2900:xl:*:*:*:*:*:*:*

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