CVE-2026-3715

Wavlink WL-WN579X3-C firewall.cgi sub_40139C stack-based overflow

CVSS 8.7 HIGHEPSS 0.7%CWE-119 CWE-121

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.7EPSS 0.7%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

08 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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 initiate the attack remotely. The exploit has been made public and could be used. Upgrading to version 20260226 is able to mitigate this issue. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

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

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References

https://dl.wavlink.com/firmware/RD/WN579X3C_WAVLINK_V20260226_WO_cb3003b2.bin https://github.com/Litengzheng/vul_db/blob/main/WL-WN579X3-C/vul_17/README.md https://vuldb.com/?ctiid.349660 https://vuldb.com/?id.349660 https://vuldb.com/?submit.765325