CVE-2026-5004: A vulnerability was determined in Wavlink WL-WN579X3-C 231124

This month

HIGH 8.8MITIGATE

CVE-2026-5004 is a high-severity flaw (CVSS 8.8) affecting wl-wn579x3-c firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-119, CWE-121, CWE-787
Published	2026-03-28
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: wavlink

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

Am I affected?

Timeline

2026-03-28 18:15 UTCPublished CVE record published
2026-06-17 10:58 UTCUpdated Record last modified

wavlink wl-wn579x3-c firmware MITIGATE

Affected: 231124

Fixed in: no fixed release known

Safe to downgrade to: a release before 231124

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-2026-5004?

wl-wn579x3-c firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-5004 being exploited?

CVE-2026-5004 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-2026-5004 affect?

CVE-2026-5004 affects wl-wn579x3-c firmware. Severity is high (CVSS 8.8). 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-base

How urgent is CVE-2026-5004?

Priority 49/100. High severity; Public exploit reference

Related CVEs

CVE-2026-3716 LOW 2.4 MITIGATE A vulnerability was determined in Wavlink WL-WN579X3-C 231124
CVE-2026-3715 HIGH 8.8 MITIGATE A vulnerability was found in Wavlink WL-WN579X3-C 231124

References

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