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Review reviewHigh

CVE-2026-5667

Mitsubishi Electric Corporation Room Air Conditioners (for Japan) MSZ-BKR2223-W, Room Air Conditioners (for Japan) MSZ-BKR2224-W, Room Air Conditioners (for Japan) MSZ-BKR2523-W

Use of Hard-coded Credentials vulnerability in Mitsubishi Electric Room Air Conditioners (for Japan and outside Japan); Wireless LAN Adapters for Room Air Conditioners (for Japan and outside Japan); Wireless LAN Adapters for Packaged Air Conditioners (for Japan and outside Japan); Refrigerators (for Japan); Heat Pump Water Heaters / HEMS-Compatible Adapters / Wireless LAN Adapters (for Japan); Bathroom Dryer / Heater / Ventilation Systems (for Japan); Adapters for Airflow Ventilation Systems, Heat Pump Chilled / Hot Water Systems, and Ventilation / Air-Conditioning System Air Resorts (for J...

CVSS
7.2
EPSS
0.15%
4.66% percentile
CISA KEV
Not listed
Published
2026.06.17
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.15%
Technical severityCVSS 7.2

Vulnerability overview

Use of Hard-coded Credentials vulnerability in Mitsubishi Electric Room Air Conditioners (for Japan and outside Japan); Wireless LAN Adapters for Room Air Conditioners (for Japan and outside Japan); Wireless LAN Adapters for Packaged Air Conditioners (for Japan and outside Japan); Refrigerators (for Japan); Heat Pump Water Heaters / HEMS-Compatible Adapters / Wireless LAN Adapters (for Japan); Bathroom Dryer / Heater / Ventilation Systems (for Japan); Adapters for Airflow Ventilation Systems, Heat Pump Chilled / Hot Water Systems, and Ventilation / Air-Conditioning System Air Resorts (for J...

Affected product and versions

Product
Mitsubishi Electric Corporation Room Air Conditioners (for Japan) MSZ-BKR2223-W, Room Air Conditioners (for Japan) MSZ-BKR2224-W, Room Air Conditioners (for Japan) MSZ-BKR2523-W
Affected versions
42.00 and prior, all versions, 51.00 and prior, 01.77 and prior, 01.72 and prior, 01.14 and prior, 01.73 and prior, 01.71 and prior, 01.74 and prior, 01.76 and prior
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Mitsubishi Electric Corporation Room Air Conditioners (for Japan) MSZ-BKR2223-W, Room Air Conditioners (for Japan) MSZ-BKR2224-W, Room Air Conditioners (for Japan) MSZ-BKR2523-W and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE
CWE-798