CVE-2026-5004

Name: CVE-2026-5004
Creator: NVD / NIST
Published: 2026-03-28T18:15:57.917+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2026-5004 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A vulnerability was determined in Wavlink WL-WN579X3-C 231124. This impacts the function sub_4019FC of the file /cgi-bin/firewall.cgi of the component UPNP Handler. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

A vulnerability was determined in Wavlink WL-WN579X3-C 231124. This impacts the function sub_4019FC of the file /cgi-bin/firewall.cgi of the component UPNP Handler. Executing a manipulation of the argument UpnpEnabled can lead to stack-based buffer overflow. It is possible to launch the attack 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.

Metrics

CVSS 3.1

8.8/10

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

CVSS 4.0

7.4/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.69%

48.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wavlink	Wl-Wn579x3-C Firmware	231124

References

https://github.com/Litengzheng/vul_db/blob/main/WL-WN579X3-C/vul_200/README.mdExploit, Third Party Advisory
https://vuldb.com/submit/779149Third Party Advisory, VDB Entry
https://vuldb.com/vuln/353891Third Party Advisory, VDB Entry
https://vuldb.com/vuln/353891/ctiPermissions Required, VDB Entry

Timeline

Published: Mar 28, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-5004?

How severe is CVE-2026-5004?

CVE-2026-5004 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2026-5004?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-5004?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST