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CVE-2025-3360 Siemens CVE debrief

CVE-2025-3360 is a GLib parsing flaw triggered by a long invalid ISO 8601 timestamp passed to g_date_time_new_from_iso8601(). In the Siemens advisory trail republished by CISA, the issue is tied to affected SINEC OS firmware and mitigated by updating to V3.3 or later. The published CVSS rating is low (3.7), with impact limited to availability.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
LOW 3.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-28
Original CVE updated
2026-02-25
Advisory published
2026-01-28
Advisory updated
2026-02-25

Who should care

Operators and maintainers of Siemens industrial networking devices running affected SINEC OS firmware should review their exposure, especially the RUGGEDCOM RST2428P and the listed SCALANCE families in the advisory metadata.

Technical summary

The defect is described as an integer overflow and buffer under-read in GLib during parsing of a long invalid ISO 8601 timestamp. The CVSS vector (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L) indicates a network-reachable condition that is difficult to trigger and affects availability rather than confidentiality or integrity. Siemens' remediation is to update affected products to V3.3 or later.

Defensive priority

Medium-low. The score is low, but the flaw affects industrial equipment and can still cause service disruption, so it should be addressed during normal maintenance cycles or sooner on exposed or operationally sensitive devices.

Recommended defensive actions

  • Identify Siemens devices in scope and verify whether they run affected SINEC OS firmware.
  • Plan and apply the Siemens-recommended update to V3.3 or later using the product-specific guidance in advisory 109997626.
  • Use a maintenance window and test the firmware update path before deployment in OT environments.
  • Follow CISA ICS recommended practices to reduce exposure and limit operational impact while patching is scheduled.

Evidence notes

The source item and CVE record are dated 2026-01-28, with a latest modification on 2026-02-25. CISA's revision history shows republication updates on 2026-02-12 and 2026-02-24/25, including a clarification that only SINEC OS firmware is impacted. The remediation guidance in the Siemens advisory points to V3.3 or later for affected products.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-3360 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-3360

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

  • CVE-2025-3360 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-3360

    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-26-043-06.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-089022.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-089022.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-043-06

    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.