CVE-2024-39787 Path traversal in Wavlink AC3000

Critical 9.1 Published 14 Jan 2025 Updated 3 Nov 2025

An authenticated attacker can exploit directory traversal in the nas.cgi add_dir() function to bypass permissions and access restricted files.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-39787?

CVE-2024-39787 is a critical path traversal vulnerability in Wavlink Wl-Wn533a8 Firmware, published on 14 Jan 2025. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Multiple directory traversal vulnerabilities exist in the nas.cgi add_dir() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to permission bypass. An attacker can make an authenticated HTTP request to trigger these vulnerabilities.A directory traversal vulnerability exists within the `disk_part` POST parameter.

Weakness: CWE-22

Which versions are affected by CVE-2024-39787?

It affects 1 product.

Products include Wavlink Wl-Wn533a8 Firmware.

How do I fix CVE-2024-39787?

No fix has been published for CVE-2024-39787 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2024-39787 being exploited?

There is no known exploitation of CVE-2024-39787 in the wild and no public exploit code.

All Wavlink Wl-Wn533a8 Firmware vulnerabilities

Sources

Also known as GHSA-qxxc-5wx2-mh2q.