VULNERABILITY INTELLIGENCE

CVE-2021-33478

CVSS score6.8 MEDIUM
EPSS probability0.30%
CISA KEVNot currently listed
Published2021-07-22
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-119

Primary references