What is the CVSS score of CVE-2024-39803?

CVE-2024-39803 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.7%.

Which versions of Wl Wn533A8 Firmware are affected by CVE-2024-39803?

CVE-2024-39803 presents critical security risk, a buffer overflow vulnerability rated CVSS 9.1.

Is there a public PoC exploit available for CVE-2024-39803?

Yes, a public proof-of-concept exploit is available for CVE-2024-39803. Prioritise patching immediately. EPSS: 0.7%.

How to fix or mitigate CVE-2024-39803?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Wl Wn533A8 Firmware CVE-2024-39803

CRITICAL

Classic Buffer Overflow (CWE-120)

2025-01-14 talos-cna@cisco.com

Buffer Overflow Wl Wn533A8 Firmware

9.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.1 CRITICAL

AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:03 vuln.today

PoC Detected

Nov 03, 2025 - 22:17 vuln.today

Public exploit code

CVE Published

Jan 14, 2025 - 15:15 nvd

CRITICAL 9.1

DescriptionCVE.org

Multiple buffer overflow vulnerabilities exist in the qos.cgi qos_settings() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to stack-based buffer overflow. An attacker can make an authenticated HTTP request to trigger these vulnerabilities.A buffer overflow vulnerability exists in the sel_mode POST parameter.

AnalysisAI

Multiple buffer overflow vulnerabilities exist in the qos.cgi qos_settings() functionality of Wavlink AC3000 M33A8.V5030.210505. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. Multiple buffer overflow vulnerabilities exist in the qos.cgi qos_settings() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to stack-based buffer overflow. An attacker can make an authenticated HTTP request to trigger these vulnerabilities.A buffer overflow vulnerability exists in the sel_mode POST parameter. Affected products include: Wavlink Wl-Wn533A8 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.

CVE-2024-39803 vulnerability details – vuln.today

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Wl Wn533A8 Firmware CVE-2024-39803

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code