Improper authentication in Air Conditioning System/Centralized Controllers G-50A; GB-50A…
Priority LOW 33CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.
Summary
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.
Why it matters now
EPSS 0.00853 58th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Air Conditioning System/Centralized Controllers G-50A; GB-50A; 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 | Ver.2.50 to Ver.3.35; Ver.3.20 and prior; Ver 7.09 and prior; Ver 7.93 and prior; Ver.1.30 and prior; Ver.2.20 and prior | — | No fix listed | CNA |
- Air Conditioning System/Centralized Controllers G-50A; GB-50A; 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 Vendor— Affected Ver.2.50 to Ver.3.35; Ver.3.20 and prior; Ver 7.09 and prior; Ver 7.93 and prior; Ver.1.30 and prior; Ver.2.20 and prior Fixed in — No fix listed CNA
CPE configurations NVD · 38
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:mitsubishi:g-50a_firmware:*:*:*:*:*:*:*:* | 2.50 – 3.35 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:g-50a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:gb-50a_firmware:*:*:*:*:*:*:*:* | 2.50 – 3.35 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:gb-50a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:ag-150a-a_firmware:*:*:*:*:*:*:*:* | up to 3.20 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:ag-150a-a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:ag-150a-j_firmware:*:*:*:*:*:*:*:* | up to 3.20 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:ag-150a-j:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:gb-50ada-a_firmware:*:*:*:*:*:*:*:* | up to 3.20 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:gb-50ada-a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
- cpe:2.3:o:mitsubishi:g-50a_firmware:*:*:*:*:*:*:*:* Versions 2.50 – 3.35 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:g-50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:gb-50a_firmware:*:*:*:*:*:*:*:* Versions 2.50 – 3.35 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:gb-50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:ag-150a-a_firmware:*:*:*:*:*:*:*:* Versions up to 3.20 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:ag-150a-a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:ag-150a-j_firmware:*:*:*:*:*:*:*:* Versions up to 3.20 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:ag-150a-j:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:gb-50ada-a_firmware:*:*:*:*:*:*:*:* Versions up to 3.20 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:gb-50ada-a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
Show 28 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:mitsubishi:gb-50ada-j_firmware:*:*:*:*:*:*:*:* | up to 3.20 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:gb-50ada-j:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:eb-50gu-a_firmware:*:*:*:*:*:*:*:* | up to 7.09 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:eb-50gu-a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:eb-50gu-j_firmware:*:*:*:*:*:*:*:* | up to 7.09 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:eb-50gu-j:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:ae-200a_firmware:*:*:*:*:*:*:*:* | up to 7.93 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:ae-200a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:ae-200e_firmware:*:*:*:*:*:*:*:* | up to 7.93 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:ae-200e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:ae-50a_firmware:*:*:*:*:*:*:*:* | up to 7.93 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:ae-50a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:ae-50e_firmware:*:*:*:*:*:*:*:* | up to 7.93 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:ae-50e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:ew-50a_firmware:*:*:*:*:*:*:*:* | up to 7.93 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:ew-50a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:ew-50e_firmware:*:*:*:*:*:*:*:* | up to 7.93 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:ew-50e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:te-200a_firmware:*:*:*:*:*:*:*:* | up to 7.93 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:te-200a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:te-50a_firmware:*:*:*:*:*:*:*:* | up to 7.93 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:te-50a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:tw-50a_firmware:*:*:*:*:*:*:*:* | up to 7.93 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:tw-50a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:cms-rmd-j_firmware:*:*:*:*:*:*:*:* | up to 1.30 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:cms-rmd-j:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
| cpe:2.3:o:mitsubishi:pac-yg50eca_firmware:*:*:*:*:*:*:*:* | up to 2.20 | Vulnerable | Mitsubishi |
| cpe:2.3:h:mitsubishi:pac-yg50eca:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi |
- cpe:2.3:o:mitsubishi:gb-50ada-j_firmware:*:*:*:*:*:*:*:* Versions up to 3.20 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:gb-50ada-j:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:eb-50gu-a_firmware:*:*:*:*:*:*:*:* Versions up to 7.09 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:eb-50gu-a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:eb-50gu-j_firmware:*:*:*:*:*:*:*:* Versions up to 7.09 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:eb-50gu-j:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:ae-200a_firmware:*:*:*:*:*:*:*:* Versions up to 7.93 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:ae-200a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:ae-200e_firmware:*:*:*:*:*:*:*:* Versions up to 7.93 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:ae-200e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:ae-50a_firmware:*:*:*:*:*:*:*:* Versions up to 7.93 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:ae-50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:ae-50e_firmware:*:*:*:*:*:*:*:* Versions up to 7.93 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:ae-50e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:ew-50a_firmware:*:*:*:*:*:*:*:* Versions up to 7.93 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:ew-50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:ew-50e_firmware:*:*:*:*:*:*:*:* Versions up to 7.93 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:ew-50e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:te-200a_firmware:*:*:*:*:*:*:*:* Versions up to 7.93 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:te-200a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:te-50a_firmware:*:*:*:*:*:*:*:* Versions up to 7.93 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:te-50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:tw-50a_firmware:*:*:*:*:*:*:*:* Versions up to 7.93 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:tw-50a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:cms-rmd-j_firmware:*:*:*:*:*:*:*:* Versions up to 1.30 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:cms-rmd-j:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
- cpe:2.3:o:mitsubishi:pac-yg50eca_firmware:*:*:*:*:*:*:*:* Versions up to 2.20 Vulnerable ·Mitsubishi
- cpe:2.3:h:mitsubishi:pac-yg50eca:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20593
- 2026-10-03 Alias added: GHSA-wwxr-fcr7-6w34
References
More Mitsubishi Ae-200a Firmware vulnerabilities
- TI-2021-03828 XML external entity injection in Air Conditioning System/Centralized Controllers G-50A… CVSS 3.1HIGH 8.2
- TI-2022-08177 Broken or risky cryptographic algorithm in Air Conditioning System G-150AD; Air… CVSS 3.1HIGH 7.5
Sources
- CVE-2021-20593 · CVE Program
- CVE-2021-20593 · NVD
- FIRST EPSS
- GHSA-wwxr-fcr7-6w34 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences