CVE-2021-20595

HIGH
8.2
CVSS Score
Published: July 13, 2021 at 10:54 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
40 products affected across 1 vendorTe 200A FirmwareEb 50GU a FirmwareTe 50A Firmware· also runs on 19 platforms

Using Air Conditioning System/Centralized Controllers G-50A; GB-50A; GB-24A; AG-150A-A; AG-150A-J; GB-50ADA-A; GB-50ADA-J; EB-50GU-A; EB-50GU-J; AE-200A; AE-200E; AE-50A; AE-50E; EW-50A; EW-50E; TE-200A; TE-50A; TW-50A; CMS-RMD-J; Air Conditioning System/Expansion Controllers PAC-YG50ECA; Air Conditioning System/BM adapter BAC-HD150 by N/A?

Get instant alerts when new vulnerabilities affect Air Conditioning System/Centralized Controllers G-50A; GB-50A; GB-24A; AG-150A-A; AG-150A-J; GB-50ADA-A; GB-50ADA-J; EB-50GU-A; EB-50GU-J; AE-200A; AE-200E; AE-50A; AE-50E; EW-50A; EW-50E; TE-200A; TE-50A; TW-50A; CMS-RMD-J; Air Conditioning System/Expansion Controllers PAC-YG50ECA; Air Conditioning System/BM adapter BAC-HD150 - before attackers find them.

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Severity
HIGH8.2
Exploit prediction
EPSS 2%

Description

Improper Restriction of XML External Entity Reference vulnerability in Mitsubishi Electric Air Conditioning System/Centralized Controllers (G-50A Ver.3.35 and prior, GB-50A Ver.3.35 and prior, GB-24A Ver.9.11 and prior, 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), Air Conditioning System/Expansion Controllers (PAC-YG50ECA Ver.2.20 and prior) and Air Conditioning System/BM adapter(BAC-HD150 Ver.2.21 and prior) allows a remote unauthenticated attacker to disclose some of data in the air conditioning system or cause a DoS condition by sending specially crafted packets.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 7.93
mitsubishi-ae-200a (environment)
v ≤ 7.93
mitsubishi-ae-200e (environment)
v ≤ 7.93
mitsubishi-ae-50a (environment)
v ≤ 7.93
mitsubishi-ae-50e (environment)
v ≤ 3.20
mitsubishi-ag-150a-a (environment)
v ≤ 3.20
mitsubishi-ag-150a-j (environment)
v ≤ 1.30
mitsubishi-cms-rmd-j (environment)
v ≤ 7.09
mitsubishi-eb-50gu-a (environment)
v ≤ 7.09
mitsubishi-eb-50gu-j (environment)
v ≤ 7.93
mitsubishi-ew-50a (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-611

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