CVE-2004-0551 json
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 de…
published 2004-06-15 22 y ago modified 2026-06-16 4 mo ago also EUVD-2004-0550
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.1%
- EPSS 3.1% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
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."
Exploit prediction
3.13% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
References
-
cisco.com
/warp/public/707/cisco-sa-20040609-catos.shtml
vendor-advisory
-
kb.cert.org
/vuls/id/245190
third-party-advisory, us-government-resource
-
exchange.xforce.ibmcloud.com
/vulnerabilities/16370
vdb-entry
Sources
- CVE List CVE-2004-0551
- NVD CVE-2004-0551
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.