PatchSiren

PatchSiren cyber security CVE debrief

CVE-2025-40890 Siemens CVE debrief

A stored cross-site scripting (XSS) vulnerability exists in the Dashboards functionality of Siemens RUGGEDCOM APE1808. An authenticated low-privilege user can craft a malicious dashboard containing JavaScript and share it with victims, or socially engineer victims to import a malicious dashboard template. When viewed or imported, the payload executes in the victim's browser context, enabling unauthorized actions including data modification, availability disruption, and limited sensitive information access. The vulnerability stems from improper input validation. CISA published this advisory on August 12, 2025, with the CVE added in a January 13, 2026 revision. Siemens ProductCERT issued advisory SSA-978177, which CISA republished. A vendor fix is available in Nozomi Guardian/CMC V25.4.0, with CLI upgrade recommended due to potential Web GUI errors during the process.

Vendor
Siemens
Product
RUGGEDCOM APE1808
CVSS
HIGH 7.9
CISA KEV
Not listed in stored evidence
Original CVE published
2025-08-12
Original CVE updated
2026-01-14
Advisory published
2025-08-12
Advisory updated
2026-01-14

Who should care

Organizations operating Siemens RUGGEDCOM APE1808 with Nozomi Guardian/CMC deployments, particularly those with multiple users having dashboard access. Critical for industrial control system environments where integrity and availability are paramount. Security teams should prioritize patching and access control reviews.

Technical summary

Stored XSS in Dashboards functionality due to improper input validation. Attack vector: network. Attack complexity: high. Privileges required: low. User interaction: required. Scope: changed. Confidentiality: low. Integrity: high. Availability: high. CVSS 3.1: 7.9 (HIGH).

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade Nozomi Guardian/CMC to V25.4.0 using CLI due to potential Web GUI errors during upgrade; contact customer support for patch details
  • Use internal firewall features to restrict access to the web management interface
  • Review and delete unnecessary accounts with web management interface access
  • Audit existing dashboards for unauthorized or suspicious content
  • Implement principle of least privilege for dashboard creation and sharing permissions
  • Train users to verify dashboard sources before importing templates

Evidence notes

CVE published 2025-08-12; modified 2026-01-14. Advisory ICSA-25-226-09 initially published 2025-08-12; CVE-2025-40890 added in Revision 3 dated 2026-01-13; republished by CISA 2026-01-14. Source: CISA CSAF advisory with Siemens ProductCERT SSA-978177 as canonical source.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-40890 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-40890

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

  • CVE-2025-40890 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-40890

    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/2025/icsa-25-226-09.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-978177.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-978177.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-09

    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.