Format string vulnerability in the mod_tcl module 1.0 for Apache 2.x allows…
Priority MEDIUM 47Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.16416 96th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 44
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:http_server:2.0:*:*:*:*:*:*:* | 2.0 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.9:*:*:*:*:*:*:* | 2.0.9 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.28:*:*:*:*:*:*:* | 2.0.28 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.28:beta:*:*:*:*:*:* | 2.0.28 beta | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.28:beta:win32:*:*:*:*:* | 2.0.28 beta | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.32:*:*:*:*:*:*:* | 2.0.32 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.32:beta:win32:*:*:*:*:* | 2.0.32 beta | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.34:beta:win32:*:*:*:*:* | 2.0.34 beta | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.35:*:*:*:*:*:*:* | 2.0.35 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.36:*:*:*:*:*:*:* | 2.0.36 | Vulnerable | Apache |
- cpe:2.3:a:apache:http_server:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.9:*:*:*:*:*:*:* Versions 2.0.9 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.28:*:*:*:*:*:*:* Versions 2.0.28 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.28:beta:*:*:*:*:*:* Versions 2.0.28 beta Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.28:beta:win32:*:*:*:*:* Versions 2.0.28 beta Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.32:*:*:*:*:*:*:* Versions 2.0.32 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.32:beta:win32:*:*:*:*:* Versions 2.0.32 beta Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.34:beta:win32:*:*:*:*:* Versions 2.0.34 beta Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.35:*:*:*:*:*:*:* Versions 2.0.35 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.36:*:*:*:*:*:*:* Versions 2.0.36 Vulnerable ·Apache
Show 34 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:http_server:2.0.37:*:*:*:*:*:*:* | 2.0.37 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.38:*:*:*:*:*:*:* | 2.0.38 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.39:*:*:*:*:*:*:* | 2.0.39 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.40:*:*:*:*:*:*:* | 2.0.40 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.41:*:*:*:*:*:*:* | 2.0.41 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.42:*:*:*:*:*:*:* | 2.0.42 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.43:*:*:*:*:*:*:* | 2.0.43 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.44:*:*:*:*:*:*:* | 2.0.44 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.45:*:*:*:*:*:*:* | 2.0.45 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.46:*:*:*:*:*:*:* | 2.0.46 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.47:*:*:*:*:*:*:* | 2.0.47 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.48:*:*:*:*:*:*:* | 2.0.48 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.49:*:*:*:*:*:*:* | 2.0.49 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.50:*:*:*:*:*:*:* | 2.0.50 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.51:*:*:*:*:*:*:* | 2.0.51 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.52:*:*:*:*:*:*:* | 2.0.52 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.53:*:*:*:*:*:*:* | 2.0.53 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.54:*:*:*:*:*:*:* | 2.0.54 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.55:*:*:*:*:*:*:* | 2.0.55 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.56:*:*:*:*:*:*:* | 2.0.56 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.57:*:*:*:*:*:*:* | 2.0.57 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.58:*:*:*:*:*:*:* | 2.0.58 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.58:*:win32:*:*:*:*:* | 2.0.58 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.1.1:*:*:*:*:*:*:* | 2.1.1 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.1.2:*:*:*:*:*:*:* | 2.1.2 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.1.3:*:*:*:*:*:*:* | 2.1.3 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.1.4:*:*:*:*:*:*:* | 2.1.4 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.1.5:*:*:*:*:*:*:* | 2.1.5 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.1.6:*:*:*:*:*:*:* | 2.1.6 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.2:*:*:*:*:*:*:* | 2.2 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.2.1:*:*:*:*:*:*:* | 2.2.1 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.2.2:*:windows:*:*:*:*:* | 2.2.2 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.2.3:*:windows:*:*:*:*:* | 2.2.3 | Vulnerable | Apache |
- cpe:2.3:a:apache:http_server:2.0.37:*:*:*:*:*:*:* Versions 2.0.37 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.38:*:*:*:*:*:*:* Versions 2.0.38 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.39:*:*:*:*:*:*:* Versions 2.0.39 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.40:*:*:*:*:*:*:* Versions 2.0.40 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.41:*:*:*:*:*:*:* Versions 2.0.41 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.42:*:*:*:*:*:*:* Versions 2.0.42 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.43:*:*:*:*:*:*:* Versions 2.0.43 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.44:*:*:*:*:*:*:* Versions 2.0.44 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.45:*:*:*:*:*:*:* Versions 2.0.45 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.46:*:*:*:*:*:*:* Versions 2.0.46 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.47:*:*:*:*:*:*:* Versions 2.0.47 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.48:*:*:*:*:*:*:* Versions 2.0.48 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.49:*:*:*:*:*:*:* Versions 2.0.49 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.50:*:*:*:*:*:*:* Versions 2.0.50 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.51:*:*:*:*:*:*:* Versions 2.0.51 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.52:*:*:*:*:*:*:* Versions 2.0.52 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.53:*:*:*:*:*:*:* Versions 2.0.53 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.54:*:*:*:*:*:*:* Versions 2.0.54 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.55:*:*:*:*:*:*:* Versions 2.0.55 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.56:*:*:*:*:*:*:* Versions 2.0.56 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.57:*:*:*:*:*:*:* Versions 2.0.57 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.58:*:*:*:*:*:*:* Versions 2.0.58 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.58:*:win32:*:*:*:*:* Versions 2.0.58 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.1.2:*:*:*:*:*:*:* Versions 2.1.2 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.1.3:*:*:*:*:*:*:* Versions 2.1.3 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.1.4:*:*:*:*:*:*:* Versions 2.1.4 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.1.5:*:*:*:*:*:*:* Versions 2.1.5 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.1.6:*:*:*:*:*:*:* Versions 2.1.6 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.2:*:*:*:*:*:*:* Versions 2.2 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.2.1:*:*:*:*:*:*:* Versions 2.2.1 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.2.2:*:windows:*:*:*:*:* Versions 2.2.2 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.2.3:*:windows:*:*:*:*:* Versions 2.2.3 Vulnerable ·Apache
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-4154
- 2026-10-03 Alias added: GHSA-49w2-rrxr-3cwq
References
More Apache Http Server vulnerabilities
- TI-2021-18535 Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773) KEVCVSS 3.1CRITICAL 9.8
- TI-2021-18417 Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 KEVCVSS 3.1CRITICAL 9.8
- TI-2024-25716 Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. KEVCVSS 3.1CRITICAL 9.1
- TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
- TI-2019-00184 Use after free in Apache HTTP Server KEVCVSS 3.1HIGH 7.8
- TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2006-4154 · CVE Program
- CVE-2006-4154 · NVD
- FIRST EPSS
- GHSA-49w2-rrxr-3cwq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences