CVE-2026-3715

HIGH 8.8

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

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121 CWE-119
Vendor	wavlink
Product	wl-wn579x3-c
Published	Mar 8, 2026
Last Updated	Mar 11, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Wavlink / WL-WN579X3-C

231124

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 LtzHuster (VulDB User) VulDB