CVE-2004-0551
Cisco CatOS 5.x before 5.5(20) through 8.x before 8.2(2) and 8.3(2)GLX, as used in Catalyst switches, allows remote attackers to cause a denial of service (system crash and reload) by sending invalid packets instead of the final ACK portion of the three-way handshake to the (1) Telnet, (2) HTTP, or (3) SSH services, aka "TCP-ACK DoS attack."
- EPSS
- 3.1% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- cisco:catalyst_2901
- cisco:catalyst_2902
- cisco:catalyst_2926
- cisco:catalyst_2926f
- cisco:catalyst_2926gl
- cisco:catalyst_2926gs
- cisco:catalyst_2926t
- cisco:catalyst_2948
- cisco:catalyst_2948-ge-tx
- cisco:catalyst_2948g-l3
- cisco:catalyst_2980g
- cisco:catalyst_2980g-a
- cisco:catalyst_4000
- cisco:catalyst_4500
- cisco:catalyst_4503
- cisco:catalyst_4506
- cisco:catalyst_4507r
- cisco:catalyst_4510r
- cisco:catalyst_4912g
- cisco:catalyst_5000
- cisco:catalyst_6000_ws-svc-nam-1
- cisco:catalyst_6000_ws-svc-nam-2
- cisco:catalyst_6000_ws-x6380-nam
- cisco:catos