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CVE-2006-3906

17
FAUCET Score

CVE-2006-3906 describes a denial-of-service vulnerability in the Internet Key Exchange (IKE) version 1 protocol, affecting Cisco IOS, VPN 3000 Concentrators, and PIX firewalls. Attackers can exhaust system resources by flooding devices with IKE Phase-1 packets, exceeding the session expiration rate. This vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and potential for partial availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:h:cisco:vpn_3001_concentrator:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:h:cisco:vpn_3015_concentrator:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:h:cisco:vpn_3020_concentrator:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:h:cisco:vpn_3030_concentator:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
6.75%
Probability of exploitation in next 30 days
EPSS Percentile
93.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0675 is in the 90th percentile among its peer group of 23,705 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

archives.neohapsis.com / archives/bugtraq/2006-07/0531.html
securityreason.com / securityalert/1293
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/27972
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5299
cisco.com / en/US/tech/tk583/tk372/tsd_technology_security_response09186a00806f33d4.html
nta-monitor.com / posts/2006/07/cisco-concentrator-dos.html
osvdb.org / 29068
securityfocus.com / archive/1/441203/100/0/threaded
securityfocus.com / bid/19176