CVE-2026-12806: edimax br-6478ac v2

Vulnerability summary

CVE-2026-12806 is a high (CVSS 9.0) vulnerability in edimax br-6478ac v2. EPSS estimates a 0.80% chance of exploitation in the next 30 days, higher than 56.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 21-06-2026
   PublishedVulnerability first disclosed.
2. 23-06-2026
   Last modifiedVulnerability information updated.

Description

A vulnerability has been found in Edimax BR-6478AC V2 1.23. The impacted element is the function formWlSiteSurvey of the file /goform/formWlSiteSurvey of the component POST Request Handler. The manipulation of the argument selSSID leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
• 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.