CVE-2026-109109: Stack-based Buffer Overflow in Wavlink WL-WN530BE1-A
Description
CVE-2026-109109 is a critical stack-based buffer overflow vulnerability in the Wavlink WL-WN530BE1-A device, specifically in the strcpy function within /cgi-bin/ExportAllSettings.cgi. The flaw can be triggered remotely by manipulating the HTTP_COOKIE or X-Cmd argument, potentially allowing an attacker to execute arbitrary code. The vulnerability has a CVSS 4.0 base score of 10, indicating maximum severity. Exploit code is publicly available, but no vendor patch or official remediation has been confirmed yet.
CVSS v4.0
Score 10.0critical
Affected software
Wavlink
WL-WN530BE1-A
cpe:2.3:a:wavlink:wl-wn530be1-a:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the Wavlink WL-WN530BE1-A version 251117. It arises from improper handling of input in the strcpy function of the Settings Export CGI component (/cgi-bin/ExportAllSettings.cgi). By manipulating the HTTP_COOKIE or X-Cmd argument, an attacker can cause a stack-based buffer overflow remotely. This can lead to arbitrary code execution with no required privileges or user interaction. The vulnerability is publicly disclosed with exploit code available. The vendor was notified early, but no patch or fix information is provided in the available data.
Potential Impact
Successful exploitation allows remote attackers to trigger a stack-based buffer overflow, potentially leading to arbitrary code execution on the affected device without authentication or user interaction. This can compromise device integrity, confidentiality, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the device's management interface and monitor for suspicious activity related to HTTP_COOKIE or X-Cmd parameters. Avoid exposing the vulnerable interface to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-10-12T08:32:57.687Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acde5f52cdf04f6563ecdb1
Added to database: 10/13/2026, 08:04:05 UTC
Last enriched: 10/13/2026, 08:18:15 UTC
Last updated: 10/13/2026, 08:19:08 UTC
Views: 5
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