ssa-894058
Vulnerability from csaf_siemens
Published
2025-08-12 00:00
Modified
2025-08-12 00:00
Summary
SSA-894058: Improper Bandwidth Limitation of Network Packets Over Local USB Port Vulnerability in SIPROTEC 5

Notes

Summary
Affected SIPROTEC 5 devices do not properly limit the bandwidth for incoming network packets over their local USB port. This could allow an attacker with physical access to send specially crafted packets with high bandwidth to the affected devices thus forcing them to exhaust their memory and stop responding to any network traffic via the local USB port. Affected devices reset themselves automatically after a successful attack and the protection function is not affected of this vulnerability. Siemens has released new versions for the affected products and recommends to update to the latest versions.
General Recommendations
Operators of critical power systems (e.g. TSOs or DSOs) worldwide are usually required by regulations to build resilience into the power grids by applying multi-level redundant secondary protection schemes. It is therefore recommended that the operators check whether appropriate resilient protection measures are in place. The risk of cyber incidents impacting the grid's reliability can thus be minimized by virtue of the grid design. Siemens strongly recommends applying the provided security updates using the corresponding tooling and documented procedures made available with the product. If supported by the product, an automated means to apply the security updates across multiple product instances may be used. Siemens strongly recommends prior validation of any security update before being applied, and supervision by trained staff of the update process in the target environment. As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g. firewalls, segmentation, VPN). It is advised to configure the environment according to our operational guidelines in order to run the devices in a protected IT environment. Recommended security guidelines can be found at: https://www.siemens.com/gridsecurity
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.


To clipboard 

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    "distribution": {
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    "notes": [
      {
        "category": "summary",
        "text": "Affected SIPROTEC 5 devices do not properly limit the bandwidth for incoming network packets over their local USB port. This could allow an attacker with physical access to send specially crafted packets with high bandwidth to the affected devices thus forcing them to exhaust their memory and stop responding to any network traffic via the local USB port. Affected devices reset themselves automatically after a successful attack and the protection function is not affected of this vulnerability.\n\nSiemens has released new versions for the affected products and recommends to update to the latest versions.",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "Operators of critical power systems (e.g. TSOs or DSOs) worldwide are usually required by regulations to build resilience into the power grids by applying multi-level redundant secondary protection schemes. It is therefore recommended that the operators check whether appropriate resilient protection measures are in place. The risk of cyber incidents impacting the grid\u0027s reliability can thus be minimized by virtue of the grid design.\nSiemens strongly recommends applying the provided security updates using the corresponding tooling and documented procedures made available with the product. If supported by the product, an automated means to apply the security updates across multiple product instances may be used. Siemens strongly recommends prior validation of any security update before being applied, and supervision by trained staff of the update process in the target environment. \nAs a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g. firewalls, segmentation, VPN). It is advised to configure the environment according to our operational guidelines in order to run the devices in a protected IT environment.\n\nRecommended security guidelines can be found at:\n\nhttps://www.siemens.com/gridsecurity",
        "title": "General Recommendations"
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    "title": "SSA-894058: Improper Bandwidth Limitation of Network Packets Over Local USB Port Vulnerability in SIPROTEC 5",
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  "vulnerabilities": [
    {
      "cve": "CVE-2025-40570",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Affected devices do not properly limit the bandwidth for incoming network packets over their local USB port. This could allow an attacker with physical access to send specially crafted packets with high bandwidth to the affected devices thus forcing them to exhaust their memory and stop responding to any network traffic via the local USB port. Affected devices reset themselves automatically after a successful attack. The protection function is not affected of this vulnerability.",
          "title": "Summary"
        }
      ],
      "product_status": {
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      "remediations": [
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          "category": "vendor_fix",
          "details": "Update to V10.0 or later version",
          "product_ids": [
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            "33",
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          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109814150/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V10.0 or later version",
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          "url": "https://support.industry.siemens.com/cs/ww/en/view/109757433/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V10.0 or later version",
          "product_ids": [
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          "url": "https://support.industry.siemens.com/cs/ww/en/view/109796884/"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 2.4,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
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          ]
        }
      ],
      "title": "CVE-2025-40570"
    }
  ]
}


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  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.