Republished vendor advisory. This ICSA is a verbatim republication of Siemens ProductCERT SSA-894058 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided "as-is" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA…
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
Credit: Siemens ProductCERT
From CISA's machine-readable CSAF 2.0 advisory (JSON).
| CVE | Weakness | CVSS v3 | Details |
|---|---|---|---|
| CVE-2025-40570 | CWE-770 Allocation of Resources Without Limits or Throttling | 2.4 Low |
CVE-2025-40570 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. Vendor fix: Update to V10.0 or later version ↗ Vendor fix: Update to V10.0 or later version ↗ Vendor fix: Update to V10.0 or later version ↗ Affected, fixed & timelineAffected:
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Scores and weakness types are as CISA or the republishing vendor stated them in this advisory; the linked CVE pages carry the independently enriched CVSS and SSVC assessments.
No coverage found in monitored research blogs or news feeds.
| CVE | CVSS | Affected |
|---|---|---|
| CVE-2025-40570 | 2.4 Low | Siemens SIPROTEC 5 6MD84 (CP300) A vulnerability has been identified in SIPROTEC 5 6MD84 (CP300) (All versions < V10.0), SIPROTEC 5 6MD85 (CP300) (All versions >= V7.80 < V10.0), SIP… |
Named by the advisory itself. Each CVE links to its tracked detail page.
Each vendor links to its Known Exploited Vulnerabilities catalog page. Only vendors that appear in the KEV catalog are listed, either because the publication cites one of their KEV entries or because it names them directly.