CVE-2025-55847: wavlink wl-wn586x3a_firmware Classic Buffer Overflow

Vulnerability summary

CVE-2025-55847 is a high (CVSS 8.8) Classic Buffer Overflow vulnerability in wavlink wl-wn586x3a_firmware. EPSS estimates a 2.08% chance of exploitation in the next 30 days, higher than 81.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 26-09-2025
   PublishedVulnerability first disclosed.
2. 29-09-2025
   Last modifiedVulnerability information updated.

Description

Wavlink M86X3A_V240730 contains a buffer overflow vulnerability in the /cgi-bin/ExportAllSettings.cgi file. The vulnerability arises because the Cookie parameter does not properly validate the length of input data. Attackers can exploit this to execute arbitrary code or cause a denial of service (DoS) on the system

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.