Buffer overflow in Wavlink Wl-wn579x3-c
CVE-2026-5004
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-bas…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (28.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R.
Affected products
- Wavlink Wl-wn579x3-c — versions 231124
Weakness classification (CWE)
References
- VDB-353891 | Wavlink WL-WN579X3-C UPNP firewall.cgi sub_4019FC stack-based overflow (vdb-entry, technical-description)
- VDB-353891 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #779149 | Wavlink WL-WN579X3-C V231124 Stack-based Buffer Overflow (third-party-advisory)
- github.com/Litengzheng/vul_db/blob/main/WL-WN579X3-C/vul_200/README.md (exploit)
Frequently asked questions
- What is CVE-2026-5004?
- CVE-2026-5004 is a high-severity vulnerability in Wavlink Wl-wn579x3-c, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-28.
- How severe is CVE-2026-5004?
- High severity. CVSS v3 base score is 8.8 out of 10.