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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.

PUBLISHED Reserved 2026-03-27 | Published 2026-03-28 | Updated 2026-03-30 | Assigner VulDB




HIGH: 8.7CVSS: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
HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
HIGH: 8.8CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
9.0AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Stack-based Buffer Overflow

Memory Corruption

Product status

231124
affected

Timeline

2026-03-27:Advisory disclosed
2026-03-27:VulDB entry created
2026-03-27:VulDB entry last update

Credits

LtzHuster2 (VulDB User) reporter

VulDB coordinator

References

vuldb.com/vuln/353891 (VDB-353891 | Wavlink WL-WN579X3-C UPNP firewall.cgi sub_4019FC stack-based overflow) vdb-entry technical-description

vuldb.com/vuln/353891/cti (VDB-353891 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/779149 (Submit #779149 | Wavlink WL-WN579X3-C V231124 Stack-based Buffer Overflow) third-party-advisory

github.com/...ul_db/blob/main/WL-WN579X3-C/vul_200/README.md exploit

cve.org (CVE-2026-5004)

nvd.nist.gov (CVE-2026-5004)

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