Affected: mitel 6800_series_sip_phones, mitel 6900_series_sip_phones, mitel 6970_conference_unit

A vulnerability on Mitel 6800 Series and 6900 Series SIP Phones through 6.3 SP3 HF4, 6900w Series SIP Phone through 6.3.3, and 6970 Conference Unit through 5.1.1 SP8 allows an unauthenticated attacker to conduct an unauthorized access attack due to improper access control. A successful exploit could allow an attacker to gain unauthorized access to user information or the system configuration.