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CVE-2006-1651

25
FAUCET Score

CVE-2006-1651 describes a vulnerability in Microsoft ISA Server 2004 where remote attackers could bypass filtering rules, specifically for ICMP and TCP, by utilizing IPv6 packets. This issue, however, has been disputed by a researcher who noted that ISA Server 2004 and Windows 2003 Basic Firewall do not support IPv6 filtering, implying it's a different network protocol. With a CVSS score of 7.5, this vulnerability is considered highly severe, allowing for potential partial compromise of confidentiality, integrity, and availability with low attack complexity and no authentication required. Despite its severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2004CPE matchmatch criteria
cpe:2.3:a:microsoft:isa_server:2004:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
15.19%
Probability of exploitation in next 30 days
EPSS Percentile
96.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1519 is in the 95th percentile among its peer group of 51,551 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, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

securityfocus.com / archive/1/429816/100/0/threaded
securityfocus.com / archive/1/429846/100/0/threaded
securityfocus.com / archive/1/430281/100/0/threaded
securityfocus.com / archive/1/430684/100/0/threaded