ICSA-26-211-02

Vulnerability from csaf_cisa - Published: 2026-07-30 06:00 - Updated: 2026-07-30 06:00
Summary
Johnson Controls OpenBlue Employee
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).
Advisory Summary: Successful exploitation of these vulnerabilities could allow an attacker to upload malicious files, execute stored cross-site scripting attacks, or inject arbitrary HTML content.
Critical infrastructure sectors: Critical Manufacturing, Commercial Facilities, Government Services and Facilities, Transportation Systems, Energy
Countries/areas deployed: Worldwide
Company headquarters location: Ireland
Recommended Practices: CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities.
Recommended Practices: Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
Recommended Practices: Locate control system networks and remote devices behind firewalls and isolating them from business networks.
Recommended Practices: When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.
Recommended Practices: 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: CISA also recommends users take the following measures to protect themselves from social engineering attacks:
Recommended Practices: Do not click web links or open attachments in unsolicited email messages.
Recommended Practices: Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
Recommended Practices: Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
Recommended Practices: No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.
CVE-2026-21662
2.4 (Low)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
CWE-434 - Unrestricted Upload of File with Dangerous Type
Affected products
Product Identifier Version Remediation
Johnson Controls Inc. OpenBlue Employee (FMS Employee): <=V2025.3.1
Johnson Controls Inc. / OpenBlue Employee (FMS Employee)
 <=V2025.3.1
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation fix
CVE-2026-34495
2.4 (Low)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected products
Product Identifier Version Remediation
Johnson Controls Inc. OpenBlue Employee (FMS Employee): <=V2025.3.1
Johnson Controls Inc. / OpenBlue Employee (FMS Employee)
 <=V2025.3.1
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation fix
CVE-2026-34497
2.4 (Low)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Affected products
Product Identifier Version Remediation
Johnson Controls Inc. OpenBlue Employee (FMS Employee): <=V2025.3.1
Johnson Controls Inc. / OpenBlue Employee (FMS Employee)
 <=V2025.3.1
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation
Mitigation fix
References
Acknowledgments
Johnson Controls
To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "organization": "Johnson Controls",
        "summary": "reported these vulnerabilities to CISA"
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.cisa.gov/news-events/news/traffic-light-protocol-tlp-definitions-and-usage"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy \u0026 Use policy (https://www.cisa.gov/privacy-policy).",
        "title": "Legal Notice and Terms of Use"
      },
      {
        "category": "summary",
        "text": "Successful exploitation of these vulnerabilities could allow an attacker to upload malicious files, execute stored cross-site scripting attacks, or inject arbitrary HTML content.",
        "title": "Advisory Summary"
      },
      {
        "category": "other",
        "text": "Critical Manufacturing, Commercial Facilities, Government Services and Facilities, Transportation Systems, Energy",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "Ireland",
        "title": "Company headquarters location"
      },
      {
        "category": "general",
        "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Locate control system networks and remote devices behind firewalls and isolating them from business networks.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "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.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "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.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA also recommends users take the following measures to protect themselves from social engineering attacks:",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Do not click web links or open attachments in unsolicited email messages.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.",
        "title": "Recommended Practices"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "central@cisa.dhs.gov",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "references": [
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-26-211-02 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-211-02.json"
      },
      {
        "category": "self",
        "summary": "ICSA Advisory ICSA-26-211-02 - Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-02"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/topics/industrial-control-systems"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/ncas/tips/ST04-014"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/secure-our-world/teach-employees-avoid-phishing"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/news-events/news/avoiding-social-engineering-and-phishing-attacks"
      }
    ],
    "title": "Johnson Controls OpenBlue Employee",
    "tracking": {
      "current_release_date": "2026-07-30T06:00:00.000000Z",
      "generator": {
        "date": "2026-07-29T18:21:09.850128Z",
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-26-211-02",
      "initial_release_date": "2026-07-30T06:00:00.000000Z",
      "revision_history": [
        {
          "date": "2026-07-30T06:00:00.000000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "Initial Republication of Johnson Controls Inc. Security Advisory JCI-PSA-2026-09"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c=V2025.3.1",
                "product": {
                  "name": "Johnson Controls Inc. OpenBlue Employee (FMS Employee): \u003c=V2025.3.1",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "OpenBlue Employee (FMS Employee)"
          }
        ],
        "category": "vendor",
        "name": "Johnson Controls Inc."
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-21662",
      "cwe": {
        "id": "CWE-434",
        "name": "Unrestricted Upload of File with Dangerous Type"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The application does not adequately restrict the types of files that can be uploaded, allowing an attacker to submit files with dangerous content types. Uploaded files may be stored in predictable locations and could be leveraged for further exploitation against the application or its users.",
          "title": "Vulnerability Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "cwe.mitre.org",
          "url": "https://cwe.mitre.org/data/definitions/434.html"
        },
        {
          "category": "external",
          "summary": "www.cve.org",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-21662"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N"
        },
        {
          "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:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Johnson Controls recommends the following defensive measures to help reduce the risk of exploitation: Apply the latest product update for OpenBlue Employee (FMS Employee). Customers running V2025.3.1 [LV1.1] or earlier should apply the latest available update.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Limit application access to authorized users and enforce strong authentication.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Enable the \"Do Not Show Files\" location setting if the feature is not being actively used.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Employ a Web Application Firewall (WAF) to help detect and block malicious requests.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Investigate and promptly remove any suspicious files or content discovered within the application.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Limit internet exposure by restricting access to trusted networks or VPN users where practical.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Review uploaded content periodically and remove content that is no longer required.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2026-09 at the following location: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 2.4,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001"
          ]
        }
      ]
    },
    {
      "cve": "CVE-2026-34495",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Stored XSS occurs when the application improperly handles user input and stores malicious JavaScript code within its database. This script is then rendered and executed whenever another user accesses the compromised page. Unlike reflected XSS, persistent XSS is particularly dangerous because the payload remains active until it is manually removed from the system.",
          "title": "Vulnerability Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "cwe.mitre.org",
          "url": "https://cwe.mitre.org/data/definitions/79.html"
        },
        {
          "category": "external",
          "summary": "www.cve.org",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-34495"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N"
        },
        {
          "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:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Johnson Controls recommends the following defensive measures to help reduce the risk of exploitation: Apply the latest product update for OpenBlue Employee (FMS Employee). Customers running V2025.3.1 [LV1.1] or earlier should apply the latest available update.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Limit application access to authorized users and enforce strong authentication.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Enable the \"Do Not Show Files\" location setting if the feature is not being actively used.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Employ a Web Application Firewall (WAF) to help detect and block malicious requests.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Investigate and promptly remove any suspicious files or content discovered within the application.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Limit internet exposure by restricting access to trusted networks or VPN users where practical.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Review uploaded content periodically and remove content that is no longer required.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2026-09 at the following location: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 2.4,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001"
          ]
        }
      ]
    },
    {
      "cve": "CVE-2026-34497",
      "cwe": {
        "id": "CWE-80",
        "name": "Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)"
      },
      "notes": [
        {
          "category": "summary",
          "text": "HTML injection occurs when user-controlled input is embedded into web pages without proper encoding or sanitization, allowing attackers to inject arbitrary HTML markup. This vulnerability enables attackers to manipulate the Document Object Model (DOM) structure and alter the visual presentation of web content. Unlike Cross-Site Scripting (XSS), HTML injection typically involves static HTML content rather than executable JavaScript, though it can serve as a stepping stone to more severe attacks.",
          "title": "Vulnerability Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "cwe.mitre.org",
          "url": "https://cwe.mitre.org/data/definitions/80.html"
        },
        {
          "category": "external",
          "summary": "www.cve.org",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-34497"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N"
        },
        {
          "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:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Johnson Controls recommends the following defensive measures to help reduce the risk of exploitation: Apply the latest product update for OpenBlue Employee (FMS Employee). Customers running V2025.3.1 [LV1.1] or earlier should apply the latest available update.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Limit application access to authorized users and enforce strong authentication.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Enable the \"Do Not Show Files\" location setting if the feature is not being actively used.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Employ a Web Application Firewall (WAF) to help detect and block malicious requests.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Investigate and promptly remove any suspicious files or content discovered within the application.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Limit internet exposure by restricting access to trusted networks or VPN users where practical.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Review uploaded content periodically and remove content that is no longer required.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2026-09 at the following location: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 2.4,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001"
          ]
        }
      ]
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.