CVE-2021-33478

MEDIUM

Cisco IP Phone 8800 Series Firmware < 14.0(1) - Unauthenticated Arbitrary Code Execution in TrustZone TEE

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1

Scores

CVSS v3 6.8
EPSS 0.0013
EPSS Percentile 32.4%
Attack Vector PHYSICAL
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-119
Status published
Products (15)
cisco/ip_phone_8800_firmware < 14.0\(1\)
cisco/ip_phone_8800_series_with_multiplatform_firmware < 11.3\(4\)
cisco/ip_phone_8811_firmware < 14.0\(1\)
cisco/ip_phone_8811_with_multiplatform_firmware < 11.3\(4\)
cisco/ip_phone_8841_firmware < 14.0\(1\)
cisco/ip_phone_8841_with_multiplatform_firmware < 11.3\(4\)
cisco/ip_phone_8845_firmware < 14.0\(1\)
cisco/ip_phone_8845_with_multiplatform_firmware < 11.3\(4\)
cisco/ip_phone_8851_firmware < 14.0\(1\)
cisco/ip_phone_8851_with_multiplatform_firmware < 11.3\(4\)
... and 5 more
Published Jul 22, 2021
Tracked Since Feb 18, 2026