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TI-2026-04364 Aliases CVE-2026-5004GHSA-xcxj-mq5h-26p9

Wavlink WL-WN579X3-C UPNP firewall.cgi sub_4019FC stack-based overflow

Priority HIGH 73CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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 it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00699 53rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WavlinkWL-WN579X3-C231124—No fix listedCNA
  • WL-WN579X3-C VendorWavlink Affected 231124 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:wavlink:wl-wn579x3-c_firmware:231124:*:*:*:*:*:*:*231124VulnerableWavlink
cpe:2.3:h:wavlink:wl-wn579x3-c:-:*:*:*:*:*:*:*not specified by NVDRunning onWavlink
  • cpe:2.3:o:wavlink:wl-wn579x3-c_firmware:231124:*:*:*:*:*:*:* Versions 231124 Vulnerable ·Wavlink
  • cpe:2.3:h:wavlink:wl-wn579x3-c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Wavlink

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5004
  2. 2026-10-03 Alias added: GHSA-xcxj-mq5h-26p9

References

Exploit 1

  • TI-2026-03206 Wavlink WL-WN579X3-C firewall.cgi sub_40139C stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-03207 Wavlink WL-WN579X3-C adm.cgi sub_401AD4 cross site scripting CVSS 4.0MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences