CVE-2021-26611
📋 TL;DR
CVE-2021-26611 is a hard-coded credentials vulnerability in HejHome GKW-IC052 IP cameras that allows remote attackers to gain administrative control. Attackers can execute camera operations like rebooting, factory resetting, and taking snapshots. Organizations using these specific IP cameras are affected.
💻 Affected Systems
- HejHome GKW-IC052 IP Camera
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of camera functionality allowing attackers to disable surveillance, manipulate footage, or use the device as an entry point into the network.
Likely Case
Unauthorized access to camera controls leading to privacy violations, surveillance disruption, or device tampering.
If Mitigated
Limited impact if cameras are isolated on separate network segments with strict firewall rules preventing external access.
🎯 Exploit Status
Exploitation requires only knowledge of the hard-coded credentials, which are publicly documented. No authentication bypass needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown specific version - check vendor for firmware updates
Vendor Advisory: https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36359
Restart Required: Yes
Instructions:
1. Contact HejHome vendor for latest firmware. 2. Download firmware update. 3. Access camera web interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot camera.
🔧 Temporary Workarounds
Network segmentation
allIsolate cameras on separate VLAN with strict firewall rules preventing external and unnecessary internal access
Access control restrictions
allImplement IP whitelisting for camera management interfaces and disable remote administration if not required
🧯 If You Can't Patch
- Physically disconnect cameras from internet and restrict to internal network only
- Implement network monitoring for unauthorized access attempts to camera management interfaces
🔍 How to Verify
Check if Vulnerable:
Attempt to authenticate to camera web interface using documented hard-coded credentials. If successful, device is vulnerable.Check Version:
Access camera web interface and navigate to system information or settings page to view firmware versionVerify Fix Applied:
After firmware update, attempt authentication with hard-coded credentials. Should fail. Verify new firmware version matches vendor recommendation.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful logins
- Multiple administrative actions from unexpected IP addresses
- Camera reboot or factory reset events
Network Indicators:
- HTTP requests to camera management interface from unauthorized IPs
- Unusual traffic patterns to camera ports (typically 80, 443, 554)
SIEM Query:
source="camera_logs" AND (event="login_success" OR event="reboot" OR event="factory_reset")