# What is CVE-2004-1111? > CVE-2004-1111 is a medium-severity flaw (CVSS 5.0) in IOS from Cisco, published on 10 January 2005. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 2.3%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2004-1111 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **Precursor Intelligence risk score:** 19 out of 100 (Info); action: Track. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 5.0 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 2.3% (latest exploit-likelihood forecast) - **Published:** 10 January 2005 - **Record last updated:** 16 June 2026 - **Main product:** IOS from Cisco - **Affected products:** 10 ## What is CVE-2004-1111? In plain terms It can be attacked from anywhere on the internet without logging in. If it works, the attacker can slow it down. ### The official 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. ### What kind of flaw is it? - Unknown: Unknown ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: No login needed - What an attacker gets: Can slow it down Severity vector: `AV:N/AC:L/Au:N/C:N/I:N/A:P` ## Is CVE-2004-1111 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 2.3%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 2.3%, 2.3%, 2.3%, 2.3%, 2.3%, 2.3%, 2.3%. ### Timeline - 10 January 2005: Published - 16 June 2026: Record last updated ### How Precursor Intelligence ranks it CVE-2004-1111 scores **19 out of 100 (Info)**, with the action "Track". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: smaller factor - Threat activity around it: smaller factor 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2004-1111? The published record lists 10 products. - [IOS](https://www.precursorintelligence.com/product/cisco/ios) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 12.2(14)sz, 12.2(18)ew, 12.2(18)ewa, 12.2(18)s, 12.2(18)se, 12.2(18)sv, 12.2(18)sw, 12.2(20)ew - [7200 Router](https://www.precursorintelligence.com/product/cisco/7200_router) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions - [7300 Router](https://www.precursorintelligence.com/product/cisco/7300_router) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions - [7500 Router](https://www.precursorintelligence.com/product/cisco/7500_router) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions - [7600 Router](https://www.precursorintelligence.com/product/cisco/7600_router) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions - [Catalyst 7600](https://www.precursorintelligence.com/product/cisco/catalyst_7600) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions - [Multiservice Platform 2650](https://www.precursorintelligence.com/product/cisco/multiservice_platform_2650) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions - [Multiservice Platform 2650xm](https://www.precursorintelligence.com/product/cisco/multiservice_platform_2650xm) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions - [Multiservice Platform 2651](https://www.precursorintelligence.com/product/cisco/multiservice_platform_2651) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions - [Multiservice Platform 2651xm](https://www.precursorintelligence.com/product/cisco/multiservice_platform_2651xm) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions ## How do I fix CVE-2004-1111? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the latest update from the vendor. The references list where the vendor has published details. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [ciac.org](http://www.ciac.org/ciac/bulletins/p-034.shtml) - [cisco.com](http://www.cisco.com/warp/public/707/cisco-sa-20041110-dhcp.shtml) - [kb.cert.org](http://www.kb.cert.org/vuls/id/630104) (Third-party advisory, Government resource) - [us-cert.gov](http://www.us-cert.gov/cas/techalerts/TA04-316A.html) (Government resource) - [exchange.xforce.ibmcloud.com](https://exchange.xforce.ibmcloud.com/vulnerabilities/18021) - [oval.cisecurity.org](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5632) ## Questions ### What is CVE-2004-1111? CVE-2004-1111 is a medium-severity flaw in IOS from Cisco, published on 10 January 2005. It can be attacked from anywhere on the internet without logging in. If it works, the attacker can slow it down. ### How serious is CVE-2004-1111? It scores 5.0 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2004-1111 is 19 out of 100, which is Info. Its action is "Track". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2004-1111 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 2.3%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2004-1111 affect? For IOS from Cisco: 12.2(14)sz, 12.2(18)ew, 12.2(18)ewa, 12.2(18)s, 12.2(18)se, 12.2(18)sv and 2 more. The record lists 10 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2004-1111? Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2004-1111 affect you? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact