CVE-2001-0566

Cisco Catalyst 2900XL - Denial of Service via Empty UDP Packet to SNMP Port

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2001-0566. PoCs published by bashis.

AI-analyzed exploit summary The exploit describes a DoS vulnerability in Cisco Catalyst switches where sending an empty UDP packet to the SNMP port causes the switch to cease operating. This occurs when the switch is booted with SNMP disabled.

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.

Exploits (1)

exploitdb WRITEUP VERIFIED
by bashis · textdoshardware
https://www.exploit-db.com/exploits/20824

The exploit describes a DoS vulnerability in Cisco Catalyst switches where sending an empty UDP packet to the SNMP port causes the switch to cease operating. This occurs when the switch is booted with SNMP disabled.

Classification
Writeup 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Cisco Catalyst series switches (firmware unspecified)
No auth needed
Prerequisites: SNMP disabled on the target switch · Network access to the SNMP port (UDP 161)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Broken Link mailing-list x_refsource_bugtraq
http://archives.neohapsis.com/archives/bugtraq/2001-05/0040.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/6515

Scores

EPSS 0.0642
EPSS Percentile 92.8%

Details

CWE
CWE-20
Status published
Products (1)
cisco/catalyst_2900 xl
Published Aug 14, 2001
Tracked Since Feb 18, 2026