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CVE-2006-3855

18
FAUCET Score

CVE-2006-3855 describes a critical vulnerability in IBM Informix Dynamic Server (IDS) where authenticated remote users can execute arbitrary C code. This is achieved by exploiting the ifx_load_internal function to load malicious libraries containing DllMain or _init functions. With a CVSS score of 6.5, this vulnerability presents a significant risk, allowing for complete compromise of confidentiality, integrity, and availability (C:P/I:P/A:P) with low attack complexity (AC:L) over the network (AV:N). Despite its age and severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
9.4CPE matchmatch criteria
cpe:2.3:a:ibm:informix_dynamic_server:9.4:*:*:*:*:*:*:*
9.40.tc5CPE matchmatch criteria
cpe:2.3:a:ibm:informix_dynamic_server:9.40.tc5:*:*:*:*:*:*:*
9.40.uc1CPE matchmatch criteria
cpe:2.3:a:ibm:informix_dynamic_server:9.40.uc1:*:*:*:*:*:*:*
9.40.uc2CPE matchmatch criteria
cpe:2.3:a:ibm:informix_dynamic_server:9.40.uc2:*:*:*:*:*:*:*
9.40.uc3CPE matchmatch criteria
cpe:2.3:a:ibm:informix_dynamic_server:9.40.uc3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.5MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.89%
Probability of exploitation in next 30 days
EPSS Percentile
77.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0189 is in the 90th percentile among its peer group of 21,977 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 0.1 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

secunia.com / advisories/21301
exchange.xforce.ibmcloud.com / vulnerabilities/28129
www-1.ibm.com / support/docview.wss
Not Applicable
databasesecurity.com / informix/DatabaseHackersHandbook-AttackingInformix.pdf
Broken Link
osvdb.org / 27689
Broken Link
securityfocus.com / archive/1/443133/100/0/threaded
securityfocus.com / archive/1/443184/100/0/threaded
securityfocus.com / bid/19264
PatchThird Party AdvisoryVDB Entry
vupen.com / english/advisories/2006/3077
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