Is CVE-2026-5004 actively exploited?

No active exploitation of CVE-2026-5004 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5004 be exploited remotely?

Yes. CVE-2026-5004 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5004?

CVE-2026-5004 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2026-5004

HIGH

CVE-2026-5004

CWE-119Published: March 28, 2026· Updated: Apr 3, 2026

8.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-5004 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

wavlink2 products

wl-wn579x3-c firmwarewl-wn579x3-c

Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Exploit-DB

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

PacketStorm

Security advisories & exploits

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/Litengzheng/vul_db/blob/main/WL-WN579X3-C/vul_200/README.md

ADVISORYhttps://vuldb.com/submit/779149

ADVISORYhttps://vuldb.com/vuln/353891

News & Research Mentioning CVE-2026-5004

StoneFly Storage Concentrator

CISA Alerts· Jun 30, 2026

View CSAF Summary Successful exploitation of these vulnerabilities could allow attackers to gain broad unauthorized access, execute arbitrary commands with root privileges, steal sensitive data, and perform actions on behalf of legitimate users across interconnected systems. The following versions of StoneFly Storage Concentrator are affected: Storage Concentrator <8.0.4.22 (CVE-2026-56415, CVE-2026-55721, CVE-2026-50040) Storage Concentrator Virtual Machine <8.0.4.22 (CVE-2026-56415, CVE-2026-55721, CVE-2026-50040) Storage Concentrator <8.0.4.26 (CVE-2026-50110) Storage Concentrator Virtual Machine <8.0.4.26 (CVE-2026-50110) Storage Concentrator <8.0.4.29 (CVE-2026-56413) Storage Concentrator Virtual Machine <8.0.4.29 (CVE-2026-56413) CVSS Vendor Eq [xlite_meta score:79 src:CISA Alerts xlite_fp:2f8559e4452f6c57151c549e0f027fd86b762c9dc4733bdd8bd7e1a17a2216f7]