Multiple Buffalo wireless LAN access point devices do not properly perform authentication


WAPM-1166D and WAPM-APG600H provided by BUFFALO INC. are wireless LAN access point devices. WAPM-1166D and WAPM-APG600H do not properly perform authentication (CWE-287).

SASABE Tetsuro of The University of Tokyo reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 9.8 (Critical) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
CVSS V2 Severity:
Base Metrics 10.0 (High) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: Complete
  • Integrity Impact: Complete
  • Availability Impact: Complete
Affected Products

  • WAPM-1166D firmware Ver.1.2.7 and earlier
  • WAPM-APG600H firmware Ver.1.16.1 and earlier


An attacker who can access the device may log in via telnet without authentication and access the configuration interface of the device.

[Update the Firmware]
Apply the appropriate firmware update according to the information provided by the developer.
Vendor Information

CWE (What is CWE?)

  1. Improper Authentication(CWE-287) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2017-2126

  1. JVN : JVN#48823557
Revision History

  • [2017/07/20]
      Web page was published