CVE-2025-10127
📋 TL;DR
Daikin Europe N.V. Security Gateway contains an authorization bypass vulnerability that allows attackers to access the system without valid credentials. This affects organizations using Daikin's industrial control system security gateways, potentially exposing building automation and HVAC control systems to unauthorized access.
💻 Affected Systems
- Daikin Security Gateway
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to manipulate HVAC controls, access building automation systems, and potentially pivot to other networked systems, leading to operational disruption, safety risks, and data exfiltration.
Likely Case
Unauthorized access to building control systems allowing attackers to modify temperature settings, disable alarms, or disrupt HVAC operations, potentially causing comfort issues, equipment damage, or minor operational impacts.
If Mitigated
Limited impact if systems are isolated behind firewalls, have network segmentation, and use additional authentication layers, though the vulnerability still presents a security weakness.
🎯 Exploit Status
The vulnerability allows authentication bypass through user-controlled key manipulation, making exploitation straightforward once the attack vector is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references; consult vendor advisory
Vendor Advisory: https://www.daikin.eu/en_us/customers/support.html
Restart Required: Yes
Instructions:
1. Contact Daikin support for patch availability 2. Schedule maintenance window 3. Apply vendor-provided firmware update 4. Restart Security Gateway 5. Verify functionality
🔧 Temporary Workarounds
Network Isolation
allIsolate Daikin Security Gateway from untrusted networks and internet access
Configure firewall rules to restrict access to trusted IPs only
Access Control Lists
allImplement strict network access controls
Add ACLs to only allow management from specific administrative networks
🧯 If You Can't Patch
- Implement network segmentation to isolate Daikin systems from other critical infrastructure
- Deploy additional authentication mechanisms such as VPN or multi-factor authentication for gateway access
🔍 How to Verify
Check if Vulnerable:
Check Security Gateway version against vendor advisory; attempt authentication bypass if authorized testingCheck Version:
Check via web interface or console: Typically accessible through management interfaceVerify Fix Applied:
Verify firmware version matches patched version from vendor; test authentication controls📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful access
- Unusual access patterns to Security Gateway
- Authentication logs showing bypass patterns
Network Indicators:
- Unauthorized access attempts to gateway management ports
- Traffic from unexpected sources to gateway services
SIEM Query:
source="daikin_gateway" AND (event_type="auth" AND result="success" AND user="unknown")