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Vulnerability record · CVE-2001-0566 · published 14 August 2001

CVE-2001-0566: Cisco catalyst 2900 improper input validation vulnerability

Cisco · Catalyst 2900

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.

5.0 CVSS 2.0 Medium EPSS 6.4% · top 6.5% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
6.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://archives.neohapsis.com/archives/bugtraq/2001-05/0040.html Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/6515
http://archives.neohapsis.com/archives/bugtraq/2001-05/0040.html Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/6515

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2001-0566), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.