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Full vulnerability report · 2026
CVE-2026-5667High confidence

Information Disclosure, Information Tampering, or Denial-of-Service (DoS) Vulnerability in Multiple Home Appliances

Mitsubishi Electric Corporation · Room Air Conditioners (for Japan) MSZ-BKR2223-W

7.2HighCVSS 4.0
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.24% for the current model date.

Compensating controls

  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Mitsubishi Electric Corporation Room Air Conditioners (for Japan) MSZ-BKR2223-W and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-37646

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

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 Japan); Lossnay Central Ventilation Systems (for Japan); Smart Switches for Ventilation Fans and Lossnay (for Japan); IH Cooking Heaters (for Japan); and Rice Cookers (for Japan) allows an attacker within Wi-Fi radio range of an affected product to access the affected product using a hard-coded SSID and password, thereby obtaining device data such as operation status, room set temperature, and room temperature; changing the air-conditioner or Wi-Fi settings; or causing Wi-Fi communication to enter a denial-of-service (DoS) condition.

What

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 Japan); Lossnay Central Ventilation Systems (for Japan); Smart Switches for Ventilation Fans and Lossnay (for Japan); IH Cooking Heaters (for Japan); and Rice Cookers (for Japan) allows an attacker within Wi-Fi radio range of an affected product to access the affected product using a hard-coded SSID and password, thereby obtaining device data such as operation status, room set temperature, and room temperature; changing the air-conditioner or Wi-Fi settings; or causing Wi-Fi communication to enter a denial-of-service (DoS) condition.

Why

A credential embedded in the product can be recovered or reused across installations instead of being unique to one deployment.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

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 Japan); Lossnay Central Ventilation Systems (for Japan); Smart Switches for Ventilation Fans and Lossnay (for Japan); IH Cooking Heaters (for Japan); and Rice Cookers (for Japan) allows an attacker within Wi-Fi radio range of an affected product to access the affected product using a hard-coded SSID and password, thereby obtaining device data such as operation status, room set temperature, and room temperature; changing the air-conditioner or Wi-Fi settings; or causing Wi-Fi communication to enter a denial-of-service (DoS) condition.

Why

A credential embedded in the product can be recovered or reused across installations instead of being unique to one deployment.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
an adjacent network → Use of Hard-coded Credentials → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Adjacent
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-798 ↗

CWE-798: Use of Hard-coded Credentials. The product contains hard-coded credentials, such as a password or cryptographic key.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
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

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCHighVulnerable-system confidentiality: A successful attack can cause a major loss.VILowVulnerable-system integrity: A successful attack can cause a limited loss.VALowVulnerable-system availability: A successful attack can cause a limited loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
Stolen credentials, tokens and legitimate administration functions may provide continued access without deploying a large custom toolset.
UnauthenticatedCWE-798
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Cyber Security Agency of Singapore · English · CSA-SB-20260624Security Bulletin 24 June 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 24 June 2026, published on 24 June 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-019940三菱電機製複数の家電製品におけるハードコードされた認証情報の使用に関する脆弱性

三菱電機製複数の家電製品には、ハードコードされた認証情報の使用に関する脆弱性（CWE-798、CVE-2026-5667）が存在します。 この脆弱性情報は、製品利用者への周知を目的に、開発者がJPCERT/CCに報告し、JPCERT/CCが開発者との調整を行いました。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
  • Room Air Conditioners (for Japan) MSZ-BKR2223-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR2224-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR2523-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR2524-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR2823-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR2824-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR3623-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR3624-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR4023S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR4024S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR5623S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR5624S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR6323S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR6324S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR7123S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BKR7124S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2223-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2224-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2225-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2226-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2523-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2524-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2525-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2526-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2823-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2824-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2825-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV2826-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV3623-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV3624-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV3625-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV3626-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV4023S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV4024S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV4025S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV4026S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV5623S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV5624S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV5625S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV5626S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV6323S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV6324S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV6325S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV6326S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV7123S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV7124S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV7125S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-BXV7126S-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2220E8-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2221E9-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2221E9-W-1: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2222E1-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2222E1-W-1: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2222E1-W-2: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2223E3-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2224E4-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2225E5-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2226E6-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2520E8-W: 42.00 and prior
  • Room Air Conditioners (for Japan) MSZ-EM2521E9-W: 42.00 and prior
  • 2420 additional product groups retained in the authoritative source
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 17 Jun 2026 · Last source change 17 Jun 2026, 12:05 UTC · CWE-798 · Use of Hard-coded Credentials

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-37646
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD not scheduled

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-37646↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-5667 · cve.blacktree.nl