SSA-085541

Vulnerability from csaf_siemens - Published: 2026-05-12 00:00 - Updated: 2026-05-12 00:00
Summary
SSA-085541: Missing Authentication in Critical Function in ActiveMQ Artemis (CVE-2026-27446) in Opcenter RDnL
Notes
Summary: Opcenter RDnL is affected by missing authentication in critical function in ‘ActiveMQ Artemis’. An unauthenticated attacker within the adjacent network could use the Core protocol to force a target broker to establish an outbound Core federation connection to an attacker-controlled rogue broker. This could potentially result in availability impacts or message injection into any queue via the rogue broker. Breaking the integrity of a message has a low impact due to missing auto refresh functionality and it does not contain any confidential information. ActiveMQ Artemis has released a new version and Siemens recommends to update to the latest version.
General Recommendations: As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Additional Resources: For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Terms of Use: The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.
CVE-2026-27446
7.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CWE-306 - Missing Authentication for Critical Function
Affected products
Product Identifier Version Remediation
Opcenter RDnL
Siemens / Opcenter RDnL
 vers:all/*
Mitigation
Mitigation
Mitigation
Vendor Fix
References
To clipboard 

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited. (TLPv2: TLP:CLEAR)",
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Opcenter RDnL is affected by missing authentication in critical function in \u2018ActiveMQ Artemis\u2019. An unauthenticated attacker within the adjacent network could use the Core protocol to force a target broker to establish an outbound Core federation connection to an attacker-controlled rogue broker. This could potentially result in availability impacts or message injection into any queue via the rogue broker. Breaking the integrity of a message has a low impact due to missing auto refresh functionality and it does not contain any confidential information.\n\nActiveMQ Artemis has released a new version and Siemens recommends to update to the latest version.",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens\u0027 operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\nAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
        "title": "General Recommendations"
      },
      {
        "category": "general",
        "text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "productcert@siemens.com",
      "name": "Siemens ProductCERT",
      "namespace": "https://www.siemens.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "SSA-085541: Missing Authentication in Critical Function in ActiveMQ Artemis (CVE-2026-27446) in Opcenter RDnL - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-085541.html"
      },
      {
        "category": "self",
        "summary": "SSA-085541: Missing Authentication in Critical Function in ActiveMQ Artemis (CVE-2026-27446) in Opcenter RDnL - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-085541.json"
      }
    ],
    "title": "SSA-085541: Missing Authentication in Critical Function in ActiveMQ Artemis (CVE-2026-27446) in Opcenter RDnL",
    "tracking": {
      "current_release_date": "2026-05-12T00:00:00.000Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-085541",
      "initial_release_date": "2026-05-12T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-05-12T00:00:00.000Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "Opcenter RDnL",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "Opcenter RDnL"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-27446",
      "cwe": {
        "id": "CWE-306",
        "name": "Missing Authentication for Critical Function"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Missing Authentication for Critical Function (CWE-306) vulnerability in Apache Artemis, Apache ActiveMQ Artemis. An unauthenticated remote attacker can use the Core protocol to force a target broker to establish an outbound Core federation connection to an attacker-controlled rogue broker. This could potentially result in message injection into any queue and/or message exfiltration from any queue via the rogue broker. This impacts environments that allow both:\r\n\r\n- incoming Core protocol connections from untrusted sources to the broker\r\n\r\n- outgoing Core protocol connections from the broker to untrusted targets",
          "title": "Summary"
        },
        {
          "category": "summary",
          "text": "ActiveMQ Artemis is used for Async processing between different web applications. Any message processed by a consumer will apply schema validation first. Message sent by Opcenter RD\u0026L to ActiveMQ does not contain any confidential information. Breaking the integrity of a message has a low impact (missing auto refresh functionality). Access to ActiveMQ is only allowed within the Data Center. Inbound connections to the Data Center to port 61616 (default) should be blocked.",
          "title": "For Opcenter RDnL"
        }
      ],
      "product_status": {
        "known_affected": [
          "1"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Implement and deploy a Core interceptor to deny all Core downstream federation connect packets. Such packets have a type of (int) -16 or (byte)\u00a00xfffffff0. Documentation for interceptors is available at\u00a0 https://artemis.apache.org/components/artemis/documentation/latest/intercepting-operations.html .",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "mitigation",
          "details": "Remove Core protocol support from any acceptor receiving connections from untrusted sources. Incoming Core protocol connections are supported by default via the \"artemis\" acceptor listening on port 61616. See the \"protocols\" URL parameter configured for the acceptor. An acceptor URL without this parameter supports all protocols by default, including Core",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "mitigation",
          "details": "Use two-way SSL (i.e. certificate-based authentication) in order to force every client to present the proper SSL certificate when establishing a connection before any message protocol handshake is attempted. This will prevent unauthenticated exploitation of this vulnerability",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to Apache Artemis version 2.52.0 or later version",
          "product_ids": [
            "1"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "1"
          ]
        }
      ],
      "title": "CVE-2026-27446"
    }
  ]
}


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