Buffer overflow in Wavlink Wl-wn579x3-c
CVE-2026-3715
A vulnerability was found in Wavlink WL-WN579X3-C 231124. This affects the function sub_40139C of the file /cgi-bin/firewall.cgi. Performing a manipulation of the argument del_flag results in stack-based buffer overflow. It is possible to…
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:O/RC:C.
Affected products
- Wavlink Wl-wn579x3-c — versions 231124, 20260226
Weakness classification (CWE)
References
- VDB-349660 | Wavlink WL-WN579X3-C firewall.cgi sub_40139C stack-based overflow (vdb-entry, technical-description)
- VDB-349660 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #765325 | Wavlink WL-WN579X3-C V231124 Stack-based Buffer Overflow (third-party-advisory)
- github.com/Litengzheng/vul_db/blob/main/WL-WN579X3-C/vul_17/README.md (exploit)
- dl.wavlink.com/firmware/RD/WN579X3C_WAVLINK_V20260226_WO_cb3003b2.bin (patch)
Frequently asked questions
- What is CVE-2026-3715?
- CVE-2026-3715 is a high-severity vulnerability in Wavlink Wl-wn579x3-c, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-08.
- How severe is CVE-2026-3715?
- High severity. CVSS v3 base score is 8.8 out of 10.