CVE-2018-0412: Cisco WAP121 Firmware

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability in the implementation of Extensible Authentication Protocol over LAN (EAPOL) functionality in Cisco Small Business 100 Series Wireless Access Points and Cisco Small Business 300 Series Wireless Access Points could allow an unauthenticated, adjacent attacker to force the downgrade of the encryption algorithm that is used between an authenticator (access point) and a supplicant (Wi-Fi client). The vulnerability is due to the improper processing of certain EAPOL messages that are received during the Wi-Fi handshake process. An attacker could exploit this vulnerability by establishing a man-in-the-middle position between a supplicant and an authenticator and manipulating an EAPOL message exchange to force usage of a WPA-TKIP cipher instead of the more secure AES-CCMP cipher. A successful exploit could allow the attacker to conduct subsequent cryptographic attacks, which could lead to the disclosure of confidential information. Cisco Bug IDs: CSCvj29229.

Affected products

• Cisco WAP121 Firmware: up to and including 1.0.6.6
• Cisco WAP125 Firmware: up to and including 1.0.6.6
• Cisco WAP131 Firmware: up to and including 1.0.6.6
• Cisco WAP150 Firmware: up to and including 1.0.6.6
• Cisco WAP321 Firmware: up to and including 1.0.6.6
• Cisco WAP351 Firmware: up to and including 1.0.6.6
• Cisco WAP361 Firmware: up to and including 1.0.6.6
• Cisco WAP371 Firmware: up to and including 1.0.6.6

Published 2018-08-15. Last modified 2026-06-17.