CVE-2026-3715
Wavlink WL-WN579X3-C firewall.cgi sub_40139C stack-based overflow
- State
- Published
- Severity
- 8.7 High
- Published
- Mar 8, 2026
- Updated
- Mar 11, 2026
- Reserved
- Mar 7, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulDB |
| 3.1 | 8.8 High | 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 | VulDB |
| 3.0 | 8.8 High | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C | VulDB |
| 2.0 | 9.0 High | AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
WL-WN579X3-CWavlink |
|
References
- VDB-349660 | Wavlink WL-WN579X3-C firewall.cgi sub_40139C stack-based overflowvdb-entrytechnical-description
- VDB-349660 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #765325 | Wavlink WL-WN579X3-C V231124 Stack-based Buffer Overflowthird-party-advisory
- https://github.com/Litengzheng/vul_db/blob/main/WL-WN579X3-C/vul_17/README.mdexploit
- https://dl.wavlink.com/firmware/RD/WN579X3C_WAVLINK_V20260226_WO_cb3003b2.binpatch
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