CVE-2026-9292: Rockwell FactoryTalk DataMosaix Stored XSS — Detection and Mitigation

Defenders in the Critical Manufacturing and Information Technology sectors must immediately prioritize patching for a newly identified vulnerability affecting Rockwell Automation’s FactoryTalk DataMosaix. The vulnerability, tracked as CVE-2026-9292, is a Stored Cross-Site Scripting (XSS) flaw impacting the Private Cloud versions of the software (8.02 and below).

While XSS vulnerabilities are often underestimated in OT environments, the impact here is significant. As a data integration platform, FactoryTalk DataMosaix often acts as a bridge between OT and IT. An authenticated attacker leveraging this flaw could inject malicious scripts into the web interface. When a target user—often a high-privileged engineer or administrator—loads the compromised page, the script executes in their browser context. This can lead to session hijacking, credential theft, or serve as a pivot point for further attacks against the control system infrastructure.

Technical Analysis

• Affected Product: Rockwell Automation FactoryTalk DataMosaix (Private Cloud)
• Affected Versions: <= 8.02
• CVE Identifier: CVE-2026-9292
• CVSS Score: 6.1 (Medium)
• Vulnerability Type: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Mechanism of Attack: The vulnerability arises from insufficient input validation on specific inputs within the DataMosaix web application. An attacker with authenticated access to the system can submit a payload containing malicious JavaScript (e.g., <script>alert(document.cookie)</script>). Because the issue is "Stored," this payload is saved to the server database. When another user navigates to the affected page or view, the server retrieves the unsanitized data and renders it in the victim's browser, triggering the execution of the script.

Exploitation Requirements:

1. Authentication: The attacker must have valid credentials to access the DataMosaix interface. This emphasizes the importance of Multi-Factor Authentication (MFA) and securing user accounts, as credential stuffing or phishing often precedes this exploitation.
2. User Interaction: The victim must view the specific data field or report where the script was injected.

Exploitation Status: As of the ICSA-26-197-09 advisory release, there is no indication of active, widespread exploitation in the wild. However, the presence of this vulnerability in a cloud-connected OT asset significantly increases the risk surface for lateral movement.

Detection & Response

Detecting Stored XSS is challenging because the malicious payload looks like standard traffic to the web server. Detection relies on identifying the injection attempts during the request phase or recognizing the artifacts of the script execution (rare) on the client side. The following rules focus on identifying the injection vectors in web logs and potential post-exploitation behavior on the endpoint.

SIGMA Rules

The following rules target the injection of common XSS characters (<, >, javascript:) within HTTP requests to the DataMosaix interface, as well as suspicious process spawning that might result from a successful payload delivery.

---
title: Potential Stored XSS Injection in DataMosaix
id: a1b2c3d4-5678-49ef-a0b1-234567890abc
status: experimental
description: Detects potential XSS payload injection attempts in HTTP request bodies or URIs targeting FactoryTalk DataMosaix web interfaces.
references:
 - https://www.cisa.gov/news-events/ics-advisories/icsa-26-197-09
author: Security Arsenal
date: 2026/09/26
tags:
  - attack.initial_access
  - attack.t1190
  - cve.2026.9292
logsource:
  category: webserver
  product: null
detection:
  selection:
    cs-method|contains:
      - 'POST'
      - 'GET'
    c-uri|contains|all:
      - 'DataMosaix'
      - 'DataMosaix'
    c-uri|contains:
      - '<script'
      - 'javascript:'
      - 'onerror='
      - 'onload='
  condition: selection
falsepositives:
  - Legitimate testing or data entry containing code snippets
level: medium
---
title: Browser Spawning Shell via DataMosaix Context
id: b2c3d4e5-6789-40f0-b1c2-345678901bcd
status: experimental
description: Detects browser processes spawning command shells, potentially indicating successful XSS leading to code execution in the browser context.
references:
  - https://attack.mitre.org/techniques/T1059/
author: Security Arsenal
date: 2026/09/26
tags:
  - attack.execution
  - attack.t1059.003
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    ParentImage|endswith:
      - '\chrome.exe'
      - '\msedge.exe'
      - '\firefox.exe'
    Image|endswith:
      - '\cmd.exe'
      - '\powershell.exe'
    CommandLine|contains:
      - ' -NoP '
      - ' -W hidden '
  condition: selection
falsepositives:
  - Administrative debugging or legitimate web-based tools
level: high

KQL (Microsoft Sentinel / Defender)

This hunt query focuses on web proxy logs or firewall logs forwarding to Sentinel, looking for the specific payload characteristics targeting the DataMosaix application.

// Hunt for XSS injection attempts targeting FactoryTalk DataMosaix
let SuspiciousStrings = dynamic(["<script", "javascript:", "onerror=", "onload=", "><script"]);
CommonSecurityLog
| where DeviceVendor in ("Rockwell Automation", "Cisco", "Palo Alto Networks")
| where RequestURL contains "DataMosaix" or DestinationHostName contains "DataMosaix"
| where RequestURL has_any (SuspiciousStrings) or RequestPayload has_any (SuspiciousStrings)
| project TimeGenerated, SourceIP, DestinationIP, DeviceAction, RequestURL, RequestPayload
| order by TimeGenerated desc

Velociraptor VQL

This VQL artifact hunts for processes that may have been spawned by a web browser as a secondary effect of a payload execution, or checks for the presence of known DataMosaix processes interacting with shells.

-- Hunt for suspicious child processes of browsers
SELECT Pid, Name, CommandLine, Exe, ParentPid
FROM pslist()
WHERE Name =~ 'cmd.exe' OR Name =~ 'powershell.exe'
  AND ParentPid IN (
    SELECT Pid FROM pslist() WHERE Name =~ 'chrome.exe' OR Name =~ 'msedge.exe' OR Name =~ 'firefox.exe'
  )

Remediation Script (Bash)

This script is intended for Linux-based Private Cloud deployments. It checks for common XSS strings in recent web access logs (common locations) to identify if the vulnerability has been probed, and prompts for the update.

#!/bin/bash

# Remediation/Harden Script for CVE-2026-9292
# Check logs for XSS patterns and advise on patching

echo "[*] Checking for indicators of CVE-2026-9292 exploitation attempts..."

# Define common log paths (adjust based on your specific deployment)
LOG_PATHS=("/var/log/httpd/access_log" "/var/log/nginx/access.log" "/opt/rockwell/logs/audit.log")

# XSS Pattern check
PATTERN="<script>|javascript:|onerror="
FOUND=0

for LOG in "${LOG_PATHS[@]}"; do
    if [ -f "$LOG" ]; then
        echo "[*] Scanning $LOG..."
        if grep -qP "$PATTERN" "$LOG"; then
            echo "[!] Potential XSS payload found in $LOG"
            grep -P "$PATTERN" "$LOG" | tail -n 5
            FOUND=1
        fi
    fi
done

if [ $FOUND -eq 0 ]; then
    echo "[+] No obvious XSS payloads found in standard logs."
fi

echo ""
echo "[!] ACTION REQUIRED: CVE-2026-9292 affects FactoryTalk DataMosaix <= 8.02."
echo "[*] Please download and apply the latest patch from Rockwell Automation Customer Portal."
echo "[*] Ensure all authenticated users have strong passwords and MFA is enabled."
echo "[*] Restrict access to the DataMosaix interface to specific management subnets."

Remediation

To mitigate the risk posed by CVE-2026-9292, Security Arsenal recommends the following immediate actions:

1. Patch Management: Update Rockwell Automation FactoryTalk DataMosaix Private Cloud to the latest version. The vendor advisory indicates that versions greater than 8.02 address this vulnerability. Refer to the official Rockwell Automation advisory (often released alongside or referenced in ICSA-26-197-09) for the specific patched release number.
2. Network Segmentation: Ensure that access to the DataMosaix management interface is restricted. It should not be directly accessible from the public internet. Utilize VPNs or Zero Trust Network Access (ZTNA) solutions for administrative access.
3. Input Validation (Vendor Patching): Since this is a code-level defect, vendor patching is the only complete fix. Web Application Firewalls (WAFs) can be used as a temporary mitigation to block known XSS signatures, but they should not be relied upon indefinitely.
4. Access Control Review: Audit user permissions. The vulnerability requires authentication. Ensure that "least privilege" principles are applied and that generic/shared accounts are disabled.

Vendor Advisory: CISA ICSA-26-197-09

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