{"cve":"CVE-2004-0551","nvd":{"published":"2004-08-06T04:00:00.000","modified":"2026-06-16T22:05:51.783","status":"Modified","description":"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.\"","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://www.cisco.com/warp/public/707/cisco-sa-20040609-catos.shtml","http://www.kb.cert.org/vuls/id/245190","https://exchange.xforce.ibmcloud.com/vulnerabilities/16370","http://www.cisco.com/warp/public/707/cisco-sa-20040609-catos.shtml","http://www.kb.cert.org/vuls/id/245190"],"products":["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"],"source":"nvd","synced_at":"2026-10-19T19:37:11.487553034+00:00"},"epss":{"cve":"CVE-2004-0551","score":0.03131,"percentile":0.87878,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}