CVE-2021-33478

EUVD-2021-20181
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.8 MEDIUM
PHYSICAL
LOW
NONE
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 32%
Affected Products (NVD)
VendorProductVersion
ciscoip_phone_8800_firmware
𝑥
< 14.0\(1\)
ciscoip_phone_8800_series_with_multiplatform_firmware
𝑥
< 11.3\(4\)
ciscoip_phone_8811_firmware
𝑥
< 14.0\(1\)
ciscoip_phone_8811_with_multiplatform_firmware
𝑥
< 11.3\(4\)
ciscoip_phone_8841_firmware
𝑥
< 14.0\(1\)
ciscoip_phone_8841_with_multiplatform_firmware
𝑥
< 11.3\(4\)
ciscoip_phone_8845_firmware
𝑥
< 14.0\(1\)
ciscoip_phone_8845_with_multiplatform_firmware
𝑥
< 11.3\(4\)
ciscoip_phone_8851_firmware
𝑥
< 14.0\(1\)
ciscoip_phone_8851_with_multiplatform_firmware
𝑥
< 11.3\(4\)
ciscoip_phone_8861_firmware
𝑥
< 14.0\(1\)
ciscoip_phone_8861_with_multiplatform_firmware
𝑥
< 11.3\(4\)
ciscoip_phone_8865_firmware
𝑥
< 14.0\(1\)
ciscoip_phone_8865_with_multiplatform_firmware
𝑥
< 11.3\(4\)
ciscowireless_ip_phone_8821_firmware
𝑥
< 11.0\(6\)sr1
𝑥
= Vulnerable software versions