# What is CVE-2005-4258?

> CVE-2005-4258 is a high-severity flaw (CVSS 7.8) in Catalyst from Cisco, published on 15 December 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 2.1%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2005-4258

## 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:** 50 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes.
- **Severity:** High (CVSS 7.8 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:** 2.1% (latest exploit-likelihood forecast)
- **Published:** 15 December 2005
- **Record last updated:** 16 June 2026
- **Main product:** Catalyst from Cisco
- **Affected products:** 71

## What is CVE-2005-4258? In plain terms

It can be attacked from anywhere on the internet without logging in. If it works, the attacker can take it offline.

### The official description

Unspecified Cisco Catalyst Switches allow remote attackers to cause a denial of service (device crash) via an IP packet with the same source and destination IPs and ports, and with the SYN flag set (aka LanD). NOTE: the provenance of this issue is unknown; the details are obtained solely from the BID.

### 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 take it offline

Severity vector: `AV:N/AC:L/Au:N/C:N/I:N/A:C`

## Is CVE-2005-4258 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 2.1%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 2.1%, 2.1%, 2.1%, 2.1%, 2.1%, 2.1%, 2.1%.

### Timeline

- 15 December 2005: Published
- 16 June 2026: Record last updated

### How Precursor Intelligence ranks it

CVE-2005-4258 scores **50 out of 100 (Medium)**, with the action "Plan remediation".

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-2005-4258?

The published record lists 71 products.

- [Catalyst](https://www.precursorintelligence.com/product/cisco/catalyst) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): sup2plus, sup3, 4.5_(10)
- [Catos](https://www.precursorintelligence.com/product/cisco/catos) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 3.0(7), 4.5(10), 4.5(11), 4.5(12), 4.5(13a), 4.5(2), 4.5(3), 4.5(4b), 4.5(4), 4.5(5), 4.5(6), 4.5(7), 4.5(8), 4.5(9), 5.1(1a), 5.1(1), 5.1(2a), 5.2(1a), 5.2(1), 5.2(2), 5.2(3), 5.2(4), 5.2(5), 5.2(6), 5.2(7), 5.3(1a)csx, 5.3(1)csx, 5.3(2)csx, 5.3(3)csx, 5.3(4)csx, 5.3(5a)csx, 5.3(5)csx, 5.3(6)csx, 5.4(1), 5.4(2), 5.4(3), 5.4(4), 5.5(1), 5.5(13), 5.5(19) and 33 more
- [Catalyst 2900](https://www.precursorintelligence.com/product/cisco/catalyst_2900) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions, lre_xl, xl
- [Catalyst 1900 Series](https://www.precursorintelligence.com/product/cisco/catalyst_1900_series) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions, 9.0_0.07
- [Catalyst 2820](https://www.precursorintelligence.com/product/cisco/catalyst_2820) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions, 9.0_0.07
- [Catalyst 6000 Ws-Svc-Nam-1](https://www.precursorintelligence.com/product/cisco/catalyst_6000_ws-svc-nam-1) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.2(1a), 3.1(1a)
- [Catalyst 6000 Ws-Svc-Nam-2](https://www.precursorintelligence.com/product/cisco/catalyst_6000_ws-svc-nam-2) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.2(1a), 3.1(1a)
- [Catalyst 6000 Ws-X6380-Nam](https://www.precursorintelligence.com/product/cisco/catalyst_6000_ws-x6380-nam) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.1(2), 3.1(1a)
- [Catalyst 6500 Ws-Svc-Nam-1](https://www.precursorintelligence.com/product/cisco/catalyst_6500_ws-svc-nam-1) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.2(1a), 3.1(1a)
- [Catalyst 6500 Ws-Svc-Nam-2](https://www.precursorintelligence.com/product/cisco/catalyst_6500_ws-svc-nam-2) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.2(1a), 3.1(1a)
- [Catalyst 6500 Ws-X6380-Nam](https://www.precursorintelligence.com/product/cisco/catalyst_6500_ws-x6380-nam) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.1(2), 3.1(1a)
- [Catalyst 7600 Ws-Svc-Nam-1](https://www.precursorintelligence.com/product/cisco/catalyst_7600_ws-svc-nam-1) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.2(1a), 3.1(1a)
- [Catalyst 7600 Ws-Svc-Nam-2](https://www.precursorintelligence.com/product/cisco/catalyst_7600_ws-svc-nam-2) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.2(1a), 3.1(1a)
- [Catalyst 7600 Ws-X6380-Nam](https://www.precursorintelligence.com/product/cisco/catalyst_7600_ws-x6380-nam) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.1(2), 3.1(1a)
- [IOS](https://www.precursorintelligence.com/product/cisco/ios) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 11.2(8.2)sa6, 12.0(5.2)xu
- [Catalyst 1200 Series](https://www.precursorintelligence.com/product/cisco/catalyst_1200_series) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2800 Series](https://www.precursorintelligence.com/product/cisco/catalyst_2800_series) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2901](https://www.precursorintelligence.com/product/cisco/catalyst_2901) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2902](https://www.precursorintelligence.com/product/cisco/catalyst_2902) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2920](https://www.precursorintelligence.com/product/cisco/catalyst_2920) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2926](https://www.precursorintelligence.com/product/cisco/catalyst_2926) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2926f](https://www.precursorintelligence.com/product/cisco/catalyst_2926f) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2926gl](https://www.precursorintelligence.com/product/cisco/catalyst_2926gl) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2926gs](https://www.precursorintelligence.com/product/cisco/catalyst_2926gs) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2926t](https://www.precursorintelligence.com/product/cisco/catalyst_2926t) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2940](https://www.precursorintelligence.com/product/cisco/catalyst_2940) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2948](https://www.precursorintelligence.com/product/cisco/catalyst_2948) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2948-Ge-Tx](https://www.precursorintelligence.com/product/cisco/catalyst_2948-ge-tx) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2948g-L3](https://www.precursorintelligence.com/product/cisco/catalyst_2948g-l3) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2950](https://www.precursorintelligence.com/product/cisco/catalyst_2950) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2950 Lre](https://www.precursorintelligence.com/product/cisco/catalyst_2950_lre) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2955](https://www.precursorintelligence.com/product/cisco/catalyst_2955) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2970](https://www.precursorintelligence.com/product/cisco/catalyst_2970) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2980g](https://www.precursorintelligence.com/product/cisco/catalyst_2980g) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 2980g-a](https://www.precursorintelligence.com/product/cisco/catalyst_2980g-a) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 3000](https://www.precursorintelligence.com/product/cisco/catalyst_3000) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 3200](https://www.precursorintelligence.com/product/cisco/catalyst_3200) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 3500 Xl](https://www.precursorintelligence.com/product/cisco/catalyst_3500_xl) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 3550](https://www.precursorintelligence.com/product/cisco/catalyst_3550) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 3560](https://www.precursorintelligence.com/product/cisco/catalyst_3560) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 3750](https://www.precursorintelligence.com/product/cisco/catalyst_3750) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 3750 Metro](https://www.precursorintelligence.com/product/cisco/catalyst_3750_metro) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 3900](https://www.precursorintelligence.com/product/cisco/catalyst_3900) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4000](https://www.precursorintelligence.com/product/cisco/catalyst_4000) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4200](https://www.precursorintelligence.com/product/cisco/catalyst_4200) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4224](https://www.precursorintelligence.com/product/cisco/catalyst_4224) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4232](https://www.precursorintelligence.com/product/cisco/catalyst_4232) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4232-13](https://www.precursorintelligence.com/product/cisco/catalyst_4232-13) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4500](https://www.precursorintelligence.com/product/cisco/catalyst_4500) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4503](https://www.precursorintelligence.com/product/cisco/catalyst_4503) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4506](https://www.precursorintelligence.com/product/cisco/catalyst_4506) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4507r](https://www.precursorintelligence.com/product/cisco/catalyst_4507r) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4510r](https://www.precursorintelligence.com/product/cisco/catalyst_4510r) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4840g](https://www.precursorintelligence.com/product/cisco/catalyst_4840g) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4908g-L3](https://www.precursorintelligence.com/product/cisco/catalyst_4908g-l3) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4912g](https://www.precursorintelligence.com/product/cisco/catalyst_4912g) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 4948](https://www.precursorintelligence.com/product/cisco/catalyst_4948) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 5000](https://www.precursorintelligence.com/product/cisco/catalyst_5000) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 5505](https://www.precursorintelligence.com/product/cisco/catalyst_5505) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 5509](https://www.precursorintelligence.com/product/cisco/catalyst_5509) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 6000](https://www.precursorintelligence.com/product/cisco/catalyst_6000) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 6500](https://www.precursorintelligence.com/product/cisco/catalyst_6500) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 6608](https://www.precursorintelligence.com/product/cisco/catalyst_6608) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 6624](https://www.precursorintelligence.com/product/cisco/catalyst_6624) 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
- [Catalyst 8500](https://www.precursorintelligence.com/product/cisco/catalyst_8500) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 8510csr](https://www.precursorintelligence.com/product/cisco/catalyst_8510csr) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 8510msr](https://www.precursorintelligence.com/product/cisco/catalyst_8510msr) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 8540csr](https://www.precursorintelligence.com/product/cisco/catalyst_8540csr) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst 8540msr](https://www.precursorintelligence.com/product/cisco/catalyst_8540msr) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Catalyst Ws-C2924-Xl](https://www.precursorintelligence.com/product/cisco/catalyst_ws-c2924-xl) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions

## How do I fix CVE-2005-4258?

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

- [securityfocus.com](http://www.securityfocus.com/bid/15864) (Exploit)
- [exchange.xforce.ibmcloud.com](https://exchange.xforce.ibmcloud.com/vulnerabilities/44543)

## Questions

### What is CVE-2005-4258?

CVE-2005-4258 is a high-severity flaw in Catalyst from Cisco, published on 15 December 2005. It can be attacked from anywhere on the internet without logging in. If it works, the attacker can take it offline.

### How serious is CVE-2005-4258?

It scores 7.8 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2005-4258 is 50 out of 100, which is Medium. Its action is "Plan remediation". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

### Is CVE-2005-4258 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 2.1%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2005-4258 affect?

For Catalyst from Cisco: sup2plus, sup3, 4.5_(10). The record lists 71 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2005-4258?

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-2005-4258 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.

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