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CVE-2006-4154

24
FAUCET Score

CVE-2006-4154 is a format string vulnerability in the mod_tcl module 1.0 for Apache 2.x, specifically within the set_var function in tcl_cmds.c and tcl_core.c. This flaw allows unauthenticated attackers to execute arbitrary code remotely due to improper handling of format string specifiers. With a CVSS score of 6.8, it presents a medium severity risk with potential for partial confidentiality, integrity, and availability impact. Despite its age and high FAUCET Risk Score, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
2.0CPE matchmatch criteria
cpe:2.3:a:apache:http_server:2.0:*:*:*:*:*:*:*
2.0.9CPE matchmatch criteria
cpe:2.3:a:apache:http_server:2.0.9:*:*:*:*:*:*:*
2.0.28CPE matchmatch criteria
cpe:2.3:a:apache:http_server:2.0.28:*:*:*:*:*:*:*
2.0.28CPE matchmatch criteria
cpe:2.3:a:apache:http_server:2.0.28:beta:*:*:*:*:*:*
2.0.28CPE matchmatch criteria
cpe:2.3:a:apache:http_server:2.0.28:beta:win32:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
15.97%
Probability of exploitation in next 30 days
EPSS Percentile
96.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.1597 is in the 97th percentile among its peer group of 19,958 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, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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

labs.idefense.com / intelligence/vulnerabilities/display.php
PatchVendor Advisory
secunia.com / advisories/22458
secunia.com / advisories/22549
security.gentoo.org / glsa/glsa-200610-12.xml
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/29550
kb.cert.org / vuls/id/366020
US Government Resource
osvdb.org / 29536
securityfocus.com / bid/20527
vupen.com / english/advisories/2006/4033