CVE-2006-4154

CVE-2006-4154 is a medium-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 6.8. Its EPSS exploit-prediction score of 16% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

Format string vulnerability in the mod_tcl module 1.0 for Apache 2.x allows context-dependent attackers to execute arbitrary code via format string specifiers that are not properly handled in a set_var function call in (1) tcl_cmds.c and (2) tcl_core.c.

Frequently asked questions

What is CVE-2006-4154?
Format string vulnerability in the mod_tcl module 1.0 for Apache 2.x allows context-dependent attackers to execute arbitrary code via format string specifiers that are not properly handled in a set_var function call in (1) tcl_cmds.c and (2) tcl_core.c.
How severe is CVE-2006-4154?
CVE-2006-4154 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2006-4154 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-4154?
CVE-2006-4154 primarily affects Apache Http Server. In total, 44 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-4154?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-4154 published?
CVE-2006-4154 was published on 2006-10-16 and last updated on 2026-06-16.

References

Affected products (44)

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Threat intelligence

Threat-intel indicators referencing this CVE: