CVE-2024-39757: A stack-based buffer overflow vulnerability exists in the wireless.cgi AddMac() functionality of Wavlink AC300

This month

CRITICAL 9.1MITIGATE

CVE-2024-39757 is a critical-severity flaw (CVSS 9.1) affecting wl-wn533a8 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stack-based buffer overflow vulnerability exists in the wireless.cgi AddMac() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to arbitrary command execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Why this priority

Critical severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	2.5% (top 16%)
CISA exploited list	No
Weakness	CWE-121
Published	2025-01-14
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: wavlink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-01-14 15:15 UTCPublished CVE record published
2026-06-17 07:42 UTCUpdated Record last modified

wavlink wl-wn533a8 firmware MITIGATE

Affected: m33a8.v5030.210505

Fixed in: no fixed release known

Safe to downgrade to: a release before m33a8.v5030.210505

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-39757?

wl-wn533a8 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-39757 being exploited?

CVE-2024-39757 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-39757 affect?

CVE-2024-39757 affects wl-wn533a8 firmware. Severity is critical (CVSS 9.1). A stack-based buffer overflow vulnerability exists in the wireless.cgi AddMac() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to arbitrary command execution. An attacker can make an authentica

How urgent is CVE-2024-39757?

Priority 58/100. Critical severity; Public exploit reference

Related CVEs

CVE-2024-39803 CRITICAL 9.1 MITIGATE Multiple buffer overflow vulnerabilities exist in the qos.cgi qos_settings() functionality of Wavlink AC3000 M
CVE-2024-39802 CRITICAL 9.1 MITIGATE Multiple buffer overflow vulnerabilities exist in the qos.cgi qos_settings() functionality of Wavlink AC3000 M
CVE-2024-39801 CRITICAL 9.1 MITIGATE Multiple buffer overflow vulnerabilities exist in the qos.cgi qos_settings() functionality of Wavlink AC3000 M
CVE-2024-39800 CRITICAL 9.1 MITIGATE Multiple external config control vulnerabilities exists in the openvpn.cgi openvpn_server_setup() functionalit
CVE-2024-39799 CRITICAL 9.1 MITIGATE Multiple external config control vulnerabilities exists in the openvpn.cgi openvpn_server_setup() functionalit

References

← Back to latest CVEs