CVE-2003-0567

highpriority · attend · 47EPSS 0.166 · 97 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

3 exploits · functional

Likely / severe?

16.6% (97th) EPSS

CVSS 7.8 · high

Is it mine?

177 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.

cvss

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

7.8

010

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

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v2.07highAV:N/AC:L/Au:N/C:N/I:N/A:C/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimary

exploits (3)

Public proof-of-concept and weaponised exploit code.

EDB-59Cisco IOS - IPv4 Packets Denial of Servicefunctional · exploit_db
EDB-60Cisco IOS - 'cisco-bug-44020.c' IPv4 Packet Denial of Servicefunctional · exploit_db
EDB-62Cisco IOS - using hping Remote Denial of Servicefunctional · exploit_db

affected products (177)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
cisco ios= 11.0nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 11.1nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 11.1aanvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 11.1canvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 11.1ccnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 11.2nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 11.2pnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 11.2sanvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 11.3nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 11.3tnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0danvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0dbnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0dcnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0snvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0scnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0slnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0spnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0stnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*

showing 20 of 177

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 2003-08-18modified 2026-06-16

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+25171 more

references (12)

External citations — patches, advisories, analysis.

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