CVE-2026-1735
📋 TL;DR
This CVE describes a command injection vulnerability in Yealink MeetingBar A30's Diagnostic Handler component. Attackers with physical access to the device can execute arbitrary commands, potentially compromising the system. Organizations using Yealink MeetingBar A30 version 133.321.0.3 are affected.
💻 Affected Systems
- Yealink MeetingBar A30
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise allowing persistent access, data exfiltration, or use as a pivot point into internal networks.
Likely Case
Local privilege escalation, unauthorized configuration changes, or disruption of meeting functionality.
If Mitigated
Limited impact due to physical access requirement and network segmentation.
🎯 Exploit Status
Public exploit available; requires physical access to device.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Monitor Yealink security advisories for updates.
🔧 Temporary Workarounds
Physical Security Controls
allRestrict physical access to MeetingBar devices to authorized personnel only.
Network Segmentation
allIsolate MeetingBar devices on separate VLANs with strict firewall rules.
🧯 If You Can't Patch
- Implement strict physical access controls to meeting rooms containing vulnerable devices.
- Monitor network traffic from MeetingBar devices for unusual outbound connections.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or device settings menu.Check Version:
Check device web interface at http://[device-ip]/ or via device settings menu.Verify Fix Applied:
Verify firmware version has been updated beyond 133.321.0.3 when patch becomes available.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Diagnostic Handler activity outside normal operations
Network Indicators:
- Unexpected outbound connections from MeetingBar device
- Unusual network traffic patterns
SIEM Query:
source="meetingbar" AND (event="command_injection" OR process="diagnostic_handler")