high
8.5
CWE
611
Advisory Published
Updated

CVE-2021-20595: XEE

First published: Tue Jul 13 2021(Updated: )

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.

Credit: Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp

Affected SoftwareAffected VersionHow to fix
Mitsubishi G-50a Firmware>=2.50<=3.35
Mitsubishi G-50a
Mitsubishi Gb-50a Firmware>=2.50<=3.35
Mitsubishi Gb-50a
Mitsubishi Ag-150a-a Firmware<=3.20
Mitsubishi Ag-150a-a
Mitsubishi Ag-150a-j Firmware<=3.20
Mitsubishi Ag-150a-j
Mitsubishi Gb-50ada-a Firmware<=3.20
Mitsubishi Gb-50ada-a
Mitsubishi Gb-50ada-j Firmware<=3.20
Mitsubishi Gb-50ada-j
Mitsubishi Eb-50gu-a Firmware<=7.09
Mitsubishi Eb-50gu-a
Mitsubishi Eb-50gu-j Firmware<=7.09
Mitsubishi Eb-50gu-j
Mitsubishi Ae-200a Firmware<=7.93
Mitsubishi Ae-200a
Mitsubishi Ae-200e Firmware<=7.93
Mitsubishi Ae-200e
Mitsubishi Ae-50a Firmware<=7.93
Mitsubishi Ae-50a
Mitsubishi Ae-50e Firmware<=7.93
Mitsubishi Ae-50e
Mitsubishi Ew-50a Firmware<=7.93
Mitsubishi Ew-50a
Mitsubishi Ew-50e Firmware<=7.93
Mitsubishi Ew-50e
Mitsubishi Te-200a Firmware<=7.93
Mitsubishi Te-200a
Mitsubishi Te-50a Firmware<=7.93
Mitsubishi Te-50a
Mitsubishi Tw-50a Firmware<=7.93
Mitsubishi Tw-50a
Mitsubishi Cms-rmd-j Firmware<=1.30
Mitsubishi Cms-rmd-j
Mitsubishi Pac-yg50eca Firmware<=2.20
Mitsubishi Pac-yg50eca

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2021-20595.

  • What is the severity of CVE-2021-20595?

    The severity of CVE-2021-20595 is high with a CVSS score of 8.2.

  • Which software versions are affected by CVE-2021-20595?

    The affected software versions are 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, and GB-50ADA-J Ver.3.20 and prior.

  • How does CVE-2021-20595 impact Mitsubishi Electric Air Conditioning System/Centralized Controllers?

    CVE-2021-20595 allows attackers to exploit an XML External Entity (XXE) vulnerability in the affected software.

  • Is there a fix available for CVE-2021-20595?

    Yes, Mitsubishi Electric has released a security advisory with mitigation measures for CVE-2021-20595. Please refer to the vendor's advisory for more information.

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