Cisco 7940/7960 Voice over IP (VoIP) phones do not properly check the Call-ID, branch, and tag values in a NOTIFY message to verify a subscription, which allows remote attackers to spoof messages such as the "Messages waiting" message.
Affected Platforms
Cisco Ip Phone 7940Cisco Ip Phone 7940 FirmwareCisco Ip Phone 7960Cisco Ip Phone 7960 Firmware