ICSA-25-177-01

Vulnerability from csaf_cisa - Published: 2025-06-26 06:00 - Updated: 2025-12-23 07:00
Summary
Mitsubishi Electric Air Conditioning Systems (Update B)
Notes
Legal Notice and Terms of Use: This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Risk evaluation: Successful exploitation of this vulnerability could allow an attacker to bypass authentication to gain unauthorized control of the air conditioning system or access sensitive information stored in the system. The attacker may also use the disclosed sensitive information to tamper with the firmware of the affected products.
Critical infrastructure sectors: Commercial Facilities
Countries/areas deployed: Worldwide
Company headquarters location: Japan
Recommended Practices: CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
Recommended Practices: CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Recommended Practices: CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Recommended Practices: Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Recommended Practices: Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
Recommended Practices: No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
CVE-2025-3699
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-306 - Missing Authentication for Critical Function
Mitigation To minimize the risk of exploitation, ensure that air conditioning systems are configured according to Mitsubishi Electric's recommendations. Mitsubishi Electric recommends taking the following mitigation measures:
Mitigation Restrict access to air conditioning systems from untrusted networks and hosts.
Mitigation Restrict physical access to air conditioning systems, computers which can access them, and the network which is connected to them.
Mitigation Use antivirus software and ensure that the operating system and web browser are updated to the latest versions on computers that connect to air conditioning systems.
Mitigation Access restriction settings are available for the following models and versions. Depending on your environment, Mitsubishi Electric recommends enabling these settings to block access from untrusted hosts. Refer to section 6-3-3, ‘Access Restriction Settings,' in the Instruction Book – Initial Settings for usage instructions.
Mitigation The following models and versions support access restriction settings:
Vendor Fix AE-200J Ver.8.03 or later
Vendor Fix AE-200A Ver.8.03 or later
Vendor Fix AE-200E Ver.8.03 or later
Vendor Fix AE-50J Ver.8.03 or later
Vendor Fix AE-50A Ver.8.03 or later
Vendor Fix AE-50E Ver.8.03 or later
Vendor Fix EW-50J Ver.8.03 or later
Vendor Fix EW-50A Ver.8.03 or later
Vendor Fix EW-50E Ver.8.03 or later
Vendor Fix TE-200A Ver.8.03 or later
Vendor Fix TE-50A Ver.8.03 or later
Vendor Fix TW-50A Ver.8.03 or later
Mitigation Refer to Mitsubishi Electric's security bulletin for more information, including instructions for verifying the product version. https://www.mitsubishielectric.com/psirt/vulnerab…
References
Acknowledgments
Mihály Csonka
To clipboard 

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  "vulnerabilities": [
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        "name": "Missing Authentication for Critical Function"
      },
      "notes": [
        {
          "category": "summary",
          "text": "An authentication bypass vulnerability exists in Mitsubishi Electric air conditioning systems. An attacker may bypass authentication to gain unauthorized control or access sensitive information stored within the system. The attacker may use the disclosed sensitive information to tamper with the firmware of the affected products.",
          "title": "Vulnerability Summary"
        }
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      "references": [
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          "summary": "www.cve.org",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-3699"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
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      "remediations": [
        {
          "category": "mitigation",
          "details": "To minimize the risk of exploitation, ensure that air conditioning systems are configured according to Mitsubishi Electric\u0027s recommendations. Mitsubishi Electric recommends taking the following mitigation measures:",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-0010",
            "CSAFPID-0011",
            "CSAFPID-0012",
            "CSAFPID-0013",
            "CSAFPID-0014",
            "CSAFPID-0015",
            "CSAFPID-0016",
            "CSAFPID-0017",
            "CSAFPID-0018",
            "CSAFPID-0019",
            "CSAFPID-0020",
            "CSAFPID-0021",
            "CSAFPID-0022",
            "CSAFPID-0023",
            "CSAFPID-0024",
            "CSAFPID-0025",
            "CSAFPID-0026",
            "CSAFPID-0027"
          ]
        },
        {
          "category": "mitigation",
          "details": "Restrict access to air conditioning systems from untrusted networks and hosts.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-0010",
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            "CSAFPID-0012",
            "CSAFPID-0013",
            "CSAFPID-0014",
            "CSAFPID-0015",
            "CSAFPID-0016",
            "CSAFPID-0017",
            "CSAFPID-0018",
            "CSAFPID-0019",
            "CSAFPID-0020",
            "CSAFPID-0021",
            "CSAFPID-0022",
            "CSAFPID-0023",
            "CSAFPID-0024",
            "CSAFPID-0025",
            "CSAFPID-0026",
            "CSAFPID-0027"
          ]
        },
        {
          "category": "mitigation",
          "details": "Restrict physical access to air conditioning systems, computers which can access them, and the network which is connected to them.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-0010",
            "CSAFPID-0011",
            "CSAFPID-0012",
            "CSAFPID-0013",
            "CSAFPID-0014",
            "CSAFPID-0015",
            "CSAFPID-0016",
            "CSAFPID-0017",
            "CSAFPID-0018",
            "CSAFPID-0019",
            "CSAFPID-0020",
            "CSAFPID-0021",
            "CSAFPID-0022",
            "CSAFPID-0023",
            "CSAFPID-0024",
            "CSAFPID-0025",
            "CSAFPID-0026",
            "CSAFPID-0027"
          ]
        },
        {
          "category": "mitigation",
          "details": "Use antivirus software and ensure that the operating system and web browser are updated to the latest versions on computers that connect to air conditioning systems.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-0010",
            "CSAFPID-0011",
            "CSAFPID-0012",
            "CSAFPID-0013",
            "CSAFPID-0014",
            "CSAFPID-0015",
            "CSAFPID-0016",
            "CSAFPID-0017",
            "CSAFPID-0018",
            "CSAFPID-0019",
            "CSAFPID-0020",
            "CSAFPID-0021",
            "CSAFPID-0022",
            "CSAFPID-0023",
            "CSAFPID-0024",
            "CSAFPID-0025",
            "CSAFPID-0026",
            "CSAFPID-0027"
          ]
        },
        {
          "category": "mitigation",
          "details": "Access restriction settings are available for the following models and versions. Depending on your environment, Mitsubishi Electric recommends enabling these settings to block access from untrusted hosts. Refer to section 6-3-3, \u2018Access Restriction Settings,\u0027 in the Instruction Book \u2013 Initial Settings for usage instructions.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-0010",
            "CSAFPID-0011",
            "CSAFPID-0012",
            "CSAFPID-0013",
            "CSAFPID-0014",
            "CSAFPID-0015",
            "CSAFPID-0016",
            "CSAFPID-0017",
            "CSAFPID-0018",
            "CSAFPID-0019",
            "CSAFPID-0020",
            "CSAFPID-0021",
            "CSAFPID-0022",
            "CSAFPID-0023",
            "CSAFPID-0024",
            "CSAFPID-0025",
            "CSAFPID-0026",
            "CSAFPID-0027"
          ]
        },
        {
          "category": "mitigation",
          "details": "The following models and versions support access restriction settings:",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-0010",
            "CSAFPID-0011",
            "CSAFPID-0012",
            "CSAFPID-0013",
            "CSAFPID-0014",
            "CSAFPID-0015",
            "CSAFPID-0016",
            "CSAFPID-0017",
            "CSAFPID-0018",
            "CSAFPID-0019",
            "CSAFPID-0020",
            "CSAFPID-0021",
            "CSAFPID-0022",
            "CSAFPID-0023",
            "CSAFPID-0024",
            "CSAFPID-0025",
            "CSAFPID-0026",
            "CSAFPID-0027"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "AE-200J Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0015"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "AE-200A Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0016"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "AE-200E Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0017"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "AE-50J Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0018"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "AE-50A Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0019"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "AE-50E Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0020"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "EW-50J Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0021"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "EW-50A Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0022"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "EW-50E Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0023"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "TE-200A Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0024"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "TE-50A Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0025"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "TW-50A Ver.8.03 or later",
          "product_ids": [
            "CSAFPID-0026"
          ]
        },
        {
          "category": "mitigation",
          "details": "Refer to Mitsubishi Electric\u0027s security bulletin for more information, including instructions for verifying the product version.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-0010",
            "CSAFPID-0011",
            "CSAFPID-0012",
            "CSAFPID-0013",
            "CSAFPID-0014",
            "CSAFPID-0015",
            "CSAFPID-0016",
            "CSAFPID-0017",
            "CSAFPID-0018",
            "CSAFPID-0019",
            "CSAFPID-0020",
            "CSAFPID-0021",
            "CSAFPID-0022",
            "CSAFPID-0023",
            "CSAFPID-0024",
            "CSAFPID-0025",
            "CSAFPID-0026",
            "CSAFPID-0027"
          ],
          "url": "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-004_en.pdf"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-0010",
            "CSAFPID-0011",
            "CSAFPID-0012",
            "CSAFPID-0013",
            "CSAFPID-0014",
            "CSAFPID-0015",
            "CSAFPID-0016",
            "CSAFPID-0017",
            "CSAFPID-0018",
            "CSAFPID-0019",
            "CSAFPID-0020",
            "CSAFPID-0021",
            "CSAFPID-0022",
            "CSAFPID-0023",
            "CSAFPID-0024",
            "CSAFPID-0025",
            "CSAFPID-0026",
            "CSAFPID-0027"
          ]
        }
      ]
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.