CVE-2026-5004highCWE-119CWE-121

CVE-2026-5004: high-severity vulnerability in Wavlink WL-WN579X3-C

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

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.7epss 0.7%
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.
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
Affected products
Wavlink · WL-WN579X3-C
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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