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CVE-2006-3906
Internet Key Exchange (IKE) version 1 protocol, as implemented on Cisco IOS, VPN 3000 Concentrators, and PIX firewalls, allows remote…
Medium5.0EPSS 6.9%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Internet Key Exchange (IKE) version 1 protocol, as implemented on Cisco IOS, VPN 3000 Concentrators, and PIX firewalls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of IKE Phase-1 packets that exceed the session expiration rate. NOTE: it has been argued that this is due to a design weakness of the IKE version 1 protocol, in which case other vendors and implementations would also be affected.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 6.9% · top 5.9% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (10)
- http://www.nta-monitor.com/posts/2006/07/cisco-concentrator-dos.html (opens in a new tab)x_refsource_MISCx_transferred
- 19176 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 20060726 Cisco VPN Concentrator IKE resource exhaustion DoS Advisory (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 29068 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 20060728 Re: Cisco VPN Concentrator IKE resource exhaustion DoS Advisory (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- oval:org.mitre.oval:def:5299 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 1016582 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 1293 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
- 20060726 Internet Key Exchange Resource Exhaustion Attack (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- cisco-ike-resource-exhaustion-dos(27972) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2006-3906)Record last updated .