CVE-2021-20593

HIGH

Mitsubishi Air Conditioning System/Centralized Controllers - Incorrect Implementation of Authentication Algorithm

Title source: llm
STIX 2.1

Description

Incorrect Implementation of Authentication Algorithm in Mitsubishi Electric Air Conditioning System/Centralized Controllers (G-50A Ver.2.50 to Ver. 3.35, GB-50A Ver.2.50 to Ver. 3.35, AG-150A-A Ver.3.20 and prior, AG-150A-J Ver.3.20 and prior, GB-50ADA-A Ver.3.20 and prior, GB-50ADA-J Ver.3.20 and prior, EB-50GU-A Ver 7.09 and prior, EB-50GU-J Ver 7.09 and prior, AE-200A Ver 7.93 and prior, AE-200E Ver 7.93 and prior, AE-50A Ver 7.93 and prior, AE-50E Ver 7.93 and prior, EW-50A Ver 7.93 and prior, EW-50E Ver 7.93 and prior, TE-200A Ver 7.93 and prior, TE-50A Ver 7.93 and prior, TW-50A Ver 7.93 and prior, CMS-RMD-J Ver.1.30 and prior) and Air Conditioning System/Expansion Controllers (PAC-YG50ECA Ver.2.20 and prior) allows a remote authenticated attacker to impersonate administrators to disclose configuration information of the air conditioning system and tamper information (e.g. operation information and configuration of air conditioning system) by exploiting this vulnerability.

References (2)

Core 2
Core References
Third Party Advisory x_refsource_misc
https://jvn.jp/vu/JVNVU96046575/index.html

Scores

CVSS v3 7.1
EPSS 0.0085
EPSS Percentile 53.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Details

CWE
CWE-287
Status published
Products (19)
mitsubishi/ae-200a_firmware < 7.93
mitsubishi/ae-200e_firmware < 7.93
mitsubishi/ae-50a_firmware < 7.93
mitsubishi/ae-50e_firmware < 7.93
mitsubishi/ag-150a-a_firmware < 3.20
mitsubishi/ag-150a-j_firmware < 3.20
mitsubishi/cms-rmd-j_firmware < 1.30
mitsubishi/eb-50gu-a_firmware < 7.09
mitsubishi/eb-50gu-j_firmware < 7.09
mitsubishi/ew-50a_firmware < 7.93
... and 9 more
Published Jul 13, 2021
Tracked Since Feb 18, 2026