CVE-2026-9037: XCharge C6 Charging Controller Critical Firmware Vulnerability — Detection and Remediation Guide

---
title: Potential XCharge C6 Firmware Update Without Signature Verification
id: a7b8c9d0-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects potential firmware update requests to XCharge C6 devices that may lack signature verification or originate from unusual sources
references:
  - https://www.cisa.gov/news-events/ics-advisories/icsa-26-148-08
author: Security Arsenal
date: 2026/04/06
tags:
  - attack.initial_access
  - attack.t1190
  - ics
logsource:
  category: network_connection
  product: windows
detection:
  selection:
    DestinationPort|startswith: 
      - '80'
      - '443'
      - '8080'
    DestinationHostname|contains: 
      - 'xcharge'
      - 'c6-controller'
      - 'ev-charger'
  filter:
    InitiatingProcess|endswith:
      - '\chrome.exe'
      - '\firefox.exe'
      - '\msedge.exe'
  timeframe: 1h
condition: selection | count() > 10
falsepositives:
  - Legitimate administrative firmware updates
  - Authorized EV charging management software
level: high
---
title: Suspicious File Creation Patterns Indicating Firmware Manipulation
id: b8c9d0e1-2f3a-4b5c-6d7e-8f9a0b1c2d3e
status: experimental
description: Detects creation of files with firmware-related extensions or patterns in unexpected locations
references:
  - https://www.cisa.gov/news-events/ics-advisories/icsa-26-148-08
author: Security Arsenal
date: 2026/04/06
tags:
  - attack.defense_evasion
  - attack.t1027
logsource:
  category: file_creation
  product: windows
detection:
  selection:
    TargetFilename|contains:
      - 'firmware'
      - '.bin'
      - '.img'
      - '.hex'
    TargetFilename|endswith:
      - '.update'
      - '.pkg'
  filter_legit_paths:
    TargetFilename|contains:
      - '\Program Files\'
      - '\Program Files (x86)\'
  condition: selection and not filter_legit_paths
falsepositives:
  - Legitimate firmware update processes
  - System maintenance activities
level: medium
---
title: Unusual Process Execution from XCharge C6 Management Interface
id: c9d0e1f2-3a4b-5c6d-7e8f-9a0b1c2d3e4f
status: experimental
description: Detects suspicious command execution potentially stemming from exploitation of XCharge C6 management interface
references:
  - https://www.cisa.gov/news-events/ics-advisories/icsa-26-148-08
author: Security Arsenal
date: 2026/04/06
tags:
  - attack.execution
  - attack.t1059
logsource:
  category: process_creation
  product: windows
detection:
  selection_img:
    Image|endswith:
      - '\cmd.exe'
      - '\powershell.exe'
      - '\bash.exe'
  selection_parent:
    ParentImage|contains:
      - 'xcharge'
      - 'charging'
      - 'c6'
  selection_cli:
    CommandLine|contains:
      - 'nc -'
      - 'curl'
      - 'wget'
      - 'chmod +x'
  condition: selection_img and (selection_parent or selection_cli)
falsepositives:
  - Authorized administrative activities
  - Legitimate system troubleshooting
level: high

// Hunt for suspicious network connections to XCharge C6 devices
let XChargeDevices = DeviceNetworkEvents
| where RemotePort has_any ("80", "443", "8080", "8883") 
| where RemoteUrl has_any ("xcharge", "c6", "charger", "ev-charging")
| project Timestamp, DeviceName, InitiatingProcessAccountName, RemoteUrl, RemotePort, ActionType;

// Look for abnormal upload patterns indicative of firmware pushes
let SuspiciousUploads = XChargeDevices
| where ActionType == "ConnectionSuccess"
| summarize UploadCount = count(), UniquePorts = dcount(RemotePort) by DeviceName, InitiatingProcessAccountName, bin(Timestamp, 1h)
| where UploadCount > 5 or UniquePorts > 2;

// Identify processes spawned after connections to XCharge devices
let PostConnectionProcesses = DeviceProcessEvents
| where Timestamp > ago(1d)
| join kind=inner (XChargeDevices) on $left.DeviceName == $right.DeviceName, $left.Timestamp >= $right.Timestamp, $left.Timestamp <= $right.Timestamp + 5m
| project Timestamp, DeviceName, FileName, ProcessCommandLine, InitiatingProcessAccountName, ActionType;

// Combine results
SuspiciousUploads
| join kind=leftouter (PostConnectionProcesses) on DeviceName
| project Timestamp, DeviceName, InitiatingProcessAccountName, UploadCount, UniquePorts, FileName, ProcessCommandLine
| order by Timestamp desc

-- Hunt for XCharge C6 related network connections and process activity
-- Identify established connections to common management ports
LET NetworkConnections = SELECT Fqdn, RemoteAddress, RemotePort, Pid, Family, State, Username
FROM netstat()
WHERE RemotePort IN (80, 443, 8080, 8883, 5000)
   AND State = 'ESTABLISHED';

-- Identify processes that might be related to firmware manipulation
LET SuspiciousProcesses = SELECT Pid, Ppid, Name, CommandLine, Exe, Username, StartTime
FROM pslist()
WHERE Name =~ 'curl' OR Name =~ 'wget' OR Name =~ 'nc' OR Name =~ 'telnet'
   OR CommandLine =~ 'firmware' OR CommandLine =~ 'update' OR CommandLine =~ '.bin'
   OR CommandLine =~ '.hex' OR CommandLine =~ '.img';

-- Check for firmware-related files in suspicious locations
LET FirmwareFiles = SELECT FullPath, Size, Mode.Mtime, Mode.Atime, Mode.Ctime, IsDir
FROM glob(globs=['/tmp/**/*', '/var/tmp/**/*', '/home/*/.cache/**/*', '/tmp/*.*'])
WHERE Name =~ '.bin' OR Name =~ '.img' OR Name =~ '.hex' OR Name =~ '.pkg'
   OR FullPath =~ 'firmware' OR FullPath =~ 'update';

-- Combine all findings
SELECT * FROM foreach(row={
    SELECT NetworkConnections, 
           SuspiciousProcesses, 
           FirmwareFiles,
           timestamp(now()) AS HuntTime
    FROM scope()
})

#!/bin/bash
# XCharge C6 Remediation Script for CVE-2026-9037
# This script assists in identifying vulnerable XCharge C6 devices and implementing mitigations

# Logging function
log_action() {
    echo "[$(date +'%Y-%m-%d %H:%M:%S')] $1" | tee -a /var/log/xcharge_c6_remediation.log
}

# Function to check if XCharge C6 device is present on network
check_for_xcharge_devices() {
    log_action "Scanning network for XCharge C6 devices..."
    
    # Scan common management ports
    nmap -p 80,443,8080,8883,5000 --open -T4 192.168.0.0/16 2>/dev/null | grep -E "Nmap scan report|80/tcp|443/tcp|8080/tcp|8883/tcp|5000/tcp" | tee -a /var/log/xcharge_c6_scan.log
    
    # Check for MAC address patterns if available (XCharge OUI patterns would go here)
    log_action "Scan complete. Review /var/log/xcharge_c6_scan.log for results."
}

# Function to implement network segmentation for XCharge C6 devices
implement_network_segmentation() {
    log_action "Implementing network segmentation for XCharge C6 devices..."
    
    # Create iptables rules to restrict access to XCharge C6 devices
    # Note: Modify IP ranges based on your actual network configuration
    
    # Create new chain for XCharge devices
    iptables -N XCHARGE_C6_CONTROL 2>/dev/null || iptables -F XCHARGE_C6_CONTROL
    
    # Allow only management subnet to access XCharge devices (modify as needed)
    iptables -A XCHARGE_C6_CONTROL -s 10.0.0.0/24 -j ACCEPT
    
    # Drop all other access attempts
    iptables -A XCHARGE_C6_CONTROL -j DROP
    
    # Apply rules to management interface (modify interface name as needed)
    iptables -I INPUT -i eth0 -p tcp --dport 80 -j XCHARGE_C6_CONTROL
    iptables -I INPUT -i eth0 -p tcp --dport 443 -j XCHARGE_C6_CONTROL
    iptables -I INPUT -i eth0 -p tcp --dport 8080 -j XCHARGE_C6_CONTROL
    iptables -I INPUT -i eth0 -p tcp --dport 8883 -j XCHARGE_C6_CONTROL
    
    # Save rules
    iptables-save > /etc/iptables/rules.v4 2>/dev/null || service iptables save 2>/dev/null
    
    log_action "Network segmentation rules applied."
}

# Function to configure monitoring for firmware update attempts
configure_monitoring() {
    log_action "Configuring monitoring for XCharge C6 firmware update attempts..."
    
    # Create monitoring directory if it doesn't exist
    mkdir -p /var/log/xcharge_monitor
    
    # Set up tcpdump to monitor firmware update traffic
    # Note: Modify interface name as needed
    nohup tcpdump -i any -w /var/log/xcharge_monitor/xcharge_traffic.pcap 'tcp port 80 or tcp port 443 or tcp port 8080' &
    
    log_action "Monitoring initiated. Packet captures will be saved to /var/log/xcharge_monitor/"
}

# Main execution
log_action "Starting XCharge C6 CVE-2026-9037 remediation process"

# Check for root privileges
if [ "$(id -u)" -ne 0 ]; then
    log_action "ERROR: This script must be run as root"
    exit 1
fi

# Execute remediation functions
check_for_xcharge_devices
implement_network_segmentation
configure_monitoring

log_action "Remediation process complete. Review logs in /var/log/xcharge_c6_remediation.log"
log_action "IMPORTANT: Apply official firmware update from XCharge as soon as available to fully remediate CVE-2026-9037"

exit 0