CVE-2004-0551

mediumpriority · track · 21EPSS 0.031 · 88 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.13% (88th) EPSS

CVSS 5 · medium

Is it mine?

239 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USLLM-inferredCWE-400USLLM-inferred

affected products (239)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
cisco catalyst 2901all versionsnvdUScpe:2.3:h:cisco:catalyst_2901:*:*:*:*:*:*:*:*
cisco catalyst 2902all versionsnvdUScpe:2.3:h:cisco:catalyst_2902:*:*:*:*:*:*:*:*
cisco catalyst 2926all versionsnvdUScpe:2.3:h:cisco:catalyst_2926:*:*:*:*:*:*:*:*
cisco catalyst 2926fall versionsnvdUScpe:2.3:h:cisco:catalyst_2926f:*:*:*:*:*:*:*:*
cisco catalyst 2926glall versionsnvdUScpe:2.3:h:cisco:catalyst_2926gl:*:*:*:*:*:*:*:*
cisco catalyst 2926gsall versionsnvdUScpe:2.3:h:cisco:catalyst_2926gs:*:*:*:*:*:*:*:*
cisco catalyst 2926tall versionsnvdUScpe:2.3:h:cisco:catalyst_2926t:*:*:*:*:*:*:*:*
cisco catalyst 2948all versionsnvdUScpe:2.3:h:cisco:catalyst_2948:*:*:*:*:*:*:*:*
cisco catalyst 2948-ge-txall versionsnvdUScpe:2.3:h:cisco:catalyst_2948-ge-tx:*:*:*:*:*:*:*:*
cisco catalyst 2948g-l3all versionsnvdUScpe:2.3:h:cisco:catalyst_2948g-l3:*:*:*:*:*:*:*:*
cisco catalyst 2980gall versionsnvdUScpe:2.3:h:cisco:catalyst_2980g:*:*:*:*:*:*:*:*
cisco catalyst 2980g-aall versionsnvdUScpe:2.3:h:cisco:catalyst_2980g-a:*:*:*:*:*:*:*:*
cisco catalyst 4000all versionsnvdUScpe:2.3:h:cisco:catalyst_4000:*:*:*:*:*:*:*:*
cisco catalyst 4500all versionsnvdUScpe:2.3:h:cisco:catalyst_4500:*:*:*:*:*:*:*:*
cisco catalyst 4503all versionsnvdUScpe:2.3:h:cisco:catalyst_4503:*:*:*:*:*:*:*:*
cisco catalyst 4506all versionsnvdUScpe:2.3:h:cisco:catalyst_4506:*:*:*:*:*:*:*:*
cisco catalyst 4507rall versionsnvdUScpe:2.3:h:cisco:catalyst_4507r:*:*:*:*:*:*:*:*
cisco catalyst 4510rall versionsnvdUScpe:2.3:h:cisco:catalyst_4510r:*:*:*:*:*:*:*:*
cisco catalyst 4912gall versionsnvdUScpe:2.3:h:cisco:catalyst_4912g:*:*:*:*:*:*:*:*

showing 20 of 239

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2004-08-06modified 2026-06-16

references (6)

External citations — patches, advisories, analysis.

scry

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