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PatchSiren cyber security CVE debrief

CVE-2025-40892 Siemens CVE debrief

CVE-2025-40892 is a stored cross-site scripting flaw in the Reports functionality of Siemens RUGGEDCOM APE1808 devices. The issue is caused by improper validation of an input parameter. An attacker with report privileges can store a malicious payload in a report, or a victim can be tricked into importing a malicious report template. When the report is viewed or imported, the script runs in the victim’s browser context and can be used to perform unauthorized actions, affect availability, and access limited sensitive information.

Vendor
Siemens
Product
RUGGEDCOM APE1808
CVSS
HIGH 8.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-13
Original CVE updated
2026-07-09
Advisory published
2026-01-13
Advisory updated
2026-07-09

Who should care

OT and security teams responsible for Siemens RUGGEDCOM APE1808 deployments, especially administrators who manage report creation/import permissions and users who may view or import report templates.

Technical summary

The supplied advisory describes a stored XSS condition in the Reports feature. The attacker path requires either authenticated report privileges or social engineering that leads a victim to import a malicious report template. Because the payload executes in the browser context of the victim, impact can include unauthorized actions performed as that user, modification of application data, disruption of application availability, and exposure of limited sensitive information. The source corpus assigns CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H, reflecting network reachability, low attack complexity, required privileges, required user interaction, and high integrity/availability impact.

Defensive priority

High

Recommended defensive actions

  • Apply the vendor remediation guidance from the advisory corpus: upgrade to v26.2.0 and contact customer support for patch/update information.
  • Restrict report creation, editing, and import privileges to only the users who truly need them.
  • Treat imported report templates as untrusted content and review them before use.
  • Monitor for suspicious or unexpected report creation, modification, and import activity.
  • Use defense-in-depth controls recommended by CISA for industrial control systems, including least privilege and user awareness for social-engineering delivery paths.

Evidence notes

This debrief is based on the supplied CISA CSAF advisory ICSA-26-015-07 and its cited Siemens ProductCERT sources. The advisory was first published on 2026-01-13 and last updated on 2026-05-14 in the supplied corpus. The description, impact, and remediation language are taken from the source item. The corpus does not include a KEV listing for this CVE. The remediation text in the source corpus names v26.2.0; confirm applicability against the vendor advisory for this product line before deploying changes.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-40892 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-40892

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

  • CVE-2025-40892 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-40892

    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-26-015-07.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-827968.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-827968.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-015-07

    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.