● CVE
CVE-2004-0551
VendorciscoProductcatos, catalyst 4000, catalyst 5000, catalyst 2948g-l3, catalyst 2901, catalyst 2902, catalyst 2926, catalyst 2926f, catalyst 2926gl, catalyst 2926gs, catalyst 2926t, catalyst 2948, catalyst 2948-ge-tx, catalyst 2980g, catalyst 2980g-a, catalyst 4500, catalyst 4503, catalyst 4506, catalyst 4507r, catalyst 4510r, catalyst 4912g, catalyst 6000 ws-svc-nam-1, catalyst 6000 ws-svc-nam-2, catalyst 6000 ws-x6380-namDiscoveredAug 6, 2004UpdatedApr 16, 2026
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."