# CVE-2026-2527: Wavlink WL-WN579A3 login.cgi command injection

> Remote attackers can execute arbitrary commands on Wavlink WL-WN579A3 routers via the login.cgi script due to improper input validation.

- **Severity:** Medium 5.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Feb 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-wrqv-g27w-82rr

## What is CVE-2026-2527?

CVE-2026-2527 is a medium-severity command injection vulnerability in Wavlink WL-WN579A3, published on 16 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was determined in Wavlink WL-WN579A3 up to 20210219. Affected is an unknown function of the file /cgi-bin/login.cgi. Executing a manipulation of the argument key can lead to command injection. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command), CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-2527?

It affects 1 product.


Products: Wavlink Wl-Wn579a3 Firmware.

## How do I fix CVE-2026-2527?

No fix has been published for CVE-2026-2527 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2527 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2527 exists.

## Other vulnerabilities in Wavlink WL-WN579A3

- [CVE-2025-44880](https://insights.sbomify.com/CVE-2025-44880/): Command injection in n/a (critical 9.8)
- [CVE-2025-44881](https://insights.sbomify.com/CVE-2025-44881/): Command injection in n/a (critical 9.8)
- [CVE-2025-44882](https://insights.sbomify.com/CVE-2025-44882/): Command injection in n/a (critical 9.8)
- [CVE-2026-2526](https://insights.sbomify.com/CVE-2026-2526/): Wavlink WL-WN579A3 wireless.cgi multi_ssid command injection (medium 5.3)
- [CVE-2026-2528](https://insights.sbomify.com/CVE-2026-2528/): Wavlink WL-WN579A3 wireless.cgi Delete_Mac_list command injection (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2527 and fix it if it is affected.

What it is: CVE-2026-2527 is a medium-severity command injection vulnerability in Wavlink WL-WN579A3, published on 16 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2527 exists.

Affected product: Wavlink WL-WN579A3. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-2527/ (Markdown: https://insights.sbomify.com/CVE-2026-2527/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2527
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2527
- OSV: https://osv.dev/vulnerability/CVE-2026-2527

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2527/
Summaries are generated and may contain mistakes; the official description above is the record.