What is the CVSS score of CVE-2026-3715?

CVE-2026-3715 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Wl Wn579x3 C Firmware are affected by CVE-2026-3715?

A high-severity vulnerability (CVSS 8.8) affecting Wavlink WL-WN579X3-C wireless devices could allow attackers to compromise network security through the firewall configuration interface.

Is there a public PoC exploit available for CVE-2026-3715?

Yes, a public proof-of-concept exploit is available for CVE-2026-3715. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3715?

Within 24 hours: Identify and inventory all Wavlink WL-WN579X3-C devices in your environment and restrict network access to the /cgi-bin/firewall.cgi endpoint. Within 7 days: Implement network segmentation to isolate affected devices and monitor for exploitation attempts; contact Wavlink support for patch timeline and workarounds. Within 30 days: Develop a replacement plan for affected devices and evaluate alternative wireless solutions with active vendor support; conduct incident response testing for potential compromise scenarios.

Wl Wn579x3 C Firmware CVE-2026-3715

HIGH

Buffer Overflow (CWE-119)

2026-03-08 cna@vuldb.com

Buffer Overflow Stack Overflow Wl Wn579x3 C Firmware

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Mar 10, 2026 - 18:55 vuln.today

Public exploit code

CVE Published

Mar 08, 2026 - 07:16 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was found in Wavlink WL-WN579X3-C 231124. This affects the function sub_40139C of the file /cgi-bin/firewall.cgi. Performing a manipulation of the argument del_flag results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used. Upgrading to version 20260226 is able to mitigate this issue. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

AnalysisAI

Remote code execution in Wavlink WL-WN579X3-C firmware through stack-based buffer overflow in the firewall.cgi module allows unauthenticated attackers to achieve complete system compromise via manipulation of the del_flag parameter. Public exploit code exists for this vulnerability, and no patch is currently available despite vendor notification. Affected users should immediately restrict network access to the affected device until a firmware update becomes available.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Wl-Wn579X3-C Firmware. A vulnerability was found in Wavlink WL-WN579X3-C 231124. This affects the function sub_40139C of the file /cgi-bin/firewall.cgi. Performing a manipulation of the argument del_flag results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used. Upgrading to version 20260226 is able to mitigate this issue. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner an

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.