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Vulnerability record · CVE-2004-1111 · published 10 January 2005

CVE-2004-1111: Cisco ios vulnerability

Cisco · Ios

Cisco IOS 2.2(18)EW, 12.2(18)EWA, 12.2(14)SZ, 12.2(18)S, 12.2(18)SE, 12.2(18)SV, 12.2(18)SW, and other versions without the "no service dhcp" command, keep undeliverable DHCP packets in the queue instead of dropping them, which allows remote attackers to cause a denial of service (dropped traffic) via multiple undeliverable DHCP packets that exceed the input queue size.

5.0 CVSS 2.0 Medium EPSS 2.3% · top 17.0%
5.0CVSS 2.0 base score
2.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
10Affected product versions listed by NVD
12References
16 Jun 2026Last modified by NVD

Description

Cisco IOS 2.2(18)EW, 12.2(18)EWA, 12.2(14)SZ, 12.2(18)S, 12.2(18)SE, 12.2(18)SV, 12.2(18)SW, and other versions without the "no service dhcp" command, keep undeliverable DHCP packets in the queue instead of dropping them, which allows remote attackers to cause a denial of service (dropped traffic) via multiple undeliverable DHCP packets that exceed the input queue size.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

10 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.ciac.org/ciac/bulletins/p-034.shtml
http://www.cisco.com/warp/public/707/cisco-sa-20041110-dhcp.shtml
http://www.kb.cert.org/vuls/id/630104 Third Party AdvisoryUS Government Resource
http://www.us-cert.gov/cas/techalerts/TA04-316A.html US Government Resource
https://exchange.xforce.ibmcloud.com/vulnerabilities/18021
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5632
http://www.ciac.org/ciac/bulletins/p-034.shtml
http://www.cisco.com/warp/public/707/cisco-sa-20041110-dhcp.shtml
http://www.kb.cert.org/vuls/id/630104 Third Party AdvisoryUS Government Resource
http://www.us-cert.gov/cas/techalerts/TA04-316A.html US Government Resource
https://exchange.xforce.ibmcloud.com/vulnerabilities/18021
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5632

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2004-1111), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.