JVNVU#94863997
Multiple vulnerabilities in BUFFALO Wi-Fi Products

Overview

Wi-Fi products provided by BUFFALO INC. contain multiple vulnerabilities.

Products Affected

• WSR-300HP firmware versions prior to Ver.2.55
• WEX-G300 firmware versions prior to Ver.1.71

Description

The web configuration user interfaces of Wi-Fi products provided by BUFFALO INC. contain multiple vulnerabilities listed below.

• OS command injection (CWE-78)
  • CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N Base Score 8.6
  • CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Base Score 7.2
  • CVE-2026-86530
• Stack-based buffer overflow (CWE-121)
  • CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Base Score 8.7
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Base Score 7.5
  • CVE-2026-95104

Impact

• An administrative user may send a crafted HTTP request and execute an arbitrary OS command (CVE-2026-86530).
• A non-authenticated crafted HTTP request may cause a denial-of-service (DoS) condition (CVE-2026-95104).

Solution

Update the firmware
Update the firmware to the latest version according to the information provided by the developer.

The fixed versions are provided on the following date:

• WSR-300HP firmware Ver.2.55, August 25, 2026
• WEX-G300 firmware Ver.1.71, September 3, 2026