What’s Vulnerable › Vulnerabilities
CVE-2021-20593
- Severity: high (CVSS 7.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-07-13 · updated 2026-06-17
- Weakness: CWE-287
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.
Affected products
- Mitsubishi Ae-200A Firmware: through 7.93
- Mitsubishi Ae-200E Firmware: through 7.93
- Mitsubishi Ae-50A Firmware: through 7.93
- Mitsubishi Ae-50E Firmware: through 7.93
- Mitsubishi Ag-150A-A Firmware: through 3.20
- Mitsubishi Ag-150A-J Firmware: through 3.20
- Mitsubishi Cms-Rmd-J Firmware: through 1.30
- Mitsubishi Eb-50Gu-A Firmware: through 7.09
- Mitsubishi Eb-50Gu-J Firmware: through 7.09
- Mitsubishi Ew-50A Firmware: through 7.93
- Mitsubishi Ew-50E Firmware: through 7.93
- Mitsubishi G-50A Firmware: from 2.50 through 3.35
- Mitsubishi Gb-50A Firmware: from 2.50 through 3.35
- Mitsubishi Gb-50Ada-A Firmware: through 3.20
- Mitsubishi Gb-50Ada-J Firmware: through 3.20
- Mitsubishi Pac-Yg50Eca Firmware: through 2.20
- Mitsubishi Te-200A Firmware: through 7.93
- Mitsubishi Te-50A Firmware: through 7.93
- Mitsubishi Tw-50A Firmware: through 7.93
References
- https://jvn.jp/vu/JVNVU96046575/index.html
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-004_en.pdf
- https://jvn.jp/vu/JVNVU96046575/index.html
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-004_en.pdf
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