CVE-2021-33478
No fix known EPSS <1%
The TrustZone implementation in certain Broadcom MediaxChange firmware could allow an unauthenticated, physically proximate attacker to achieve arbitrary code execution in the TrustZone Trusted Execution Environment (TEE) of an affected device. This, for example, affects certain Cisco IP Phone and Wireless IP Phone products before 2021-07-07. Exploitation is possible only when the attacker can disassemble the device in order to control the voltage/current for chip pins.
Products: cisco ip_phone_8800_firmware, cisco ip_phone_8800_series_with_multiplatform_firmware, cisco ip_phone_8811_firmware, cisco ip_phone_8811_with_multiplatform_firmware, cisco ip_phone_8841_firmware, cisco ip_phone_8841_with_multiplatform_firmware, cisco ip_phone_8845_firmware, cisco ip_phone_8845_with_multiplatform_firmware, cisco ip_phone_8851_firmware, cisco ip_phone_8851_with_multiplatform_firmware, cisco ip_phone_8861_firmware, cisco ip_phone_8861_with_multiplatform_firmware, cisco ip_phone_8865_firmware, cisco ip_phone_8865_with_multiplatform_firmware, cisco wireless_ip_phone_8821_firmware