CVE-2026-5004: Wavlink WL-WN579X3-C UPNP firewall.cgi sub_4019FC stack-based overflow
A vulnerability was determined in Wavlink WL-WN579X3-C 231124. This impacts the function sub4019FC 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-5004?
CVE-2026-5004 is classified as a high severity vulnerability due to its potential for stack-based overflow and remote exploitation.
How do I fix CVE-2026-5004?
To fix CVE-2026-5004, update the Wavlink WL-WN579X3-C to the latest firmware version that addresses this vulnerability.
What component is affected by CVE-2026-5004?
CVE-2026-5004 affects the UPNP Handler component in the firewall.cgi file of the Wavlink WL-WN579X3-C.
What risk does CVE-2026-5004 pose to users?
CVE-2026-5004 poses a risk of remote code execution due to stack-based buffer overflow, potentially allowing an attacker to gain control of the affected device.
Is CVE-2026-5004 exploitable over the network?
Yes, CVE-2026-5004 is exploitable over the network, which means an attacker can exploit the vulnerability without physical access to the device.