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CVE-2006-2421

20
FAUCET Score

CVE-2006-2421 describes a stack-based buffer overflow vulnerability in Pragma FortressSSH version 4.0.7.20. This flaw allows remote attackers to execute arbitrary code by sending excessively long SSH_MSG_KEXINIT messages, which can trigger an overflow when logged. With a CVSS score of 7.5 (High), it presents a significant risk, as it is remotely exploitable with low attack complexity, potentially leading to partial confidentiality, integrity, and availability compromise. There is no evidence of active exploitation, and no public exploit code or community discussion has been identified for this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0.7.20CPE matchmatch criteria
cpe:2.3:a:pragma_systems:fortressssh:*:*:*:*:*:*:*:*

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
3.18%
Probability of exploitation in next 30 days
EPSS Percentile
86.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0318 is in the 76th percentile among its peer group of 51,485 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

secunia.com / advisories/20114
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/26498
securityfocus.com / bid/17991
vupen.com / english/advisories/2006/1820