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PatchSiren cyber security CVE debrief

CVE-2025-0395 Siemens CVE debrief

CVE-2025-0395 describes a buffer overflow risk in the GNU C Library assert() failure path when the assertion message size aligns with page size. In the CISA-republished Siemens advisory, the issue is associated with multiple RUGGEDCOM ROX products, and Siemens recommends updating to V2.17.1 or later. The CVSS v3.1 vector indicates a locally exploitable availability issue with no confidentiality or integrity impact.

Vendor
Siemens
Product
RUGGEDCOM ROX MX5000
CVSS
MEDIUM 6.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-12
Original CVE updated
2026-05-14
Advisory published
2026-05-12
Advisory updated
2026-05-14

Who should care

OT/ICS operators and maintainers of Siemens RUGGEDCOM ROX MX5000, MX5000RE, RX1400, RX1500, RX1501, RX1510, RX1511, RX1512, RX1524, RX1536, and RX5000 deployments should review this advisory. Security teams responsible for Linux-based embedded platforms that rely on affected GNU C Library versions should also validate their exposure.

Technical summary

The underlying flaw is in the GNU C Library assert() failure path. When an assertion fails, the code does not allocate enough space for the failure message string and associated size information, which can overflow a buffer if the message length aligns to page size. The source advisory ties the issue to Siemens RUGGEDCOM ROX products and lists remediation as upgrading to V2.17.1 or later. The published CVSS vector is AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating local attack conditions and availability impact only.

Defensive priority

Medium priority. Treat as a prompt maintenance item for OT systems: schedule remediation in the next feasible maintenance window, with higher urgency where local code execution paths, scripts, or untrusted operator access exist.

Recommended defensive actions

  • Upgrade affected Siemens RUGGEDCOM ROX devices to V2.17.1 or later, as recommended by Siemens.
  • Inventory the listed RUGGEDCOM ROX models and confirm whether they are running impacted software versions before the maintenance window.
  • Restrict local access to the devices and any administration or automation paths that could trigger the assert() failure path.
  • Monitor Siemens and CISA advisory updates for any changes to affected product scope or remediation guidance.
  • Document patch status and validate recovery procedures for OT devices before applying updates.

Evidence notes

The timing in this debrief uses the supplied CVE publication date of 2026-05-12 and modified date of 2026-05-14. The issue description, affected product family, and remediation all come from the supplied CISA CSAF source item and its Siemens reference material. The CVSS vector AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H supports a local, availability-focused issue.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-0395 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-0395

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-0395 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-0395

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-134-16.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-577017.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-577017.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-134-16

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.