CVE-2026-2756 Overview
A missing authentication vulnerability has been identified in OmniPEMF NeoRhythm devices running firmware versions up to 20260308. The vulnerability affects the BLE (Bluetooth Low Energy) Interface component, where an unknown function fails to properly implement authentication mechanisms. This security flaw allows unauthorized access to device functionality, potentially enabling attackers to interact with the PEMF (Pulsed Electromagnetic Field) therapy device without proper authorization.
Critical Impact
An attacker within the local network range can exploit the missing authentication in the BLE Interface to gain unauthorized access to the NeoRhythm device, potentially manipulating device settings or accessing sensitive data.
Affected Products
- OmniPEMF NeoRhythm devices with firmware up to version 20260308
- NeoRhythm BLE Interface component
Discovery Timeline
- 2026-03-21 - CVE-2026-2756 published to NVD
- 2026-03-23 - Last updated in NVD database
Technical Details for CVE-2026-2756
Vulnerability Analysis
This vulnerability stems from CWE-287 (Improper Authentication), a fundamental security weakness where the BLE Interface component fails to properly verify the identity of users or devices attempting to connect. The attack must be initiated within adjacent network range, specifically Bluetooth proximity, which limits the attack surface to physical proximity scenarios.
The exploitation is characterized as having high complexity, meaning successful attacks require specific conditions to be met and potentially sophisticated techniques. The difficult exploitability rating indicates that while the vulnerability exists, leveraging it successfully presents significant challenges for attackers.
The vendor, OmniPEMF, was contacted early about this disclosure but did not respond, leaving users without official remediation guidance.
Root Cause
The root cause of CVE-2026-2756 is the absence of proper authentication mechanisms in the BLE Interface component. When Bluetooth Low Energy connections are established, the device fails to verify that the connecting party is authorized to access device functions. This implementation oversight allows any device within BLE range to potentially interact with the NeoRhythm without credentials or pairing verification.
Attack Vector
The attack vector requires adjacent network access, specifically Bluetooth Low Energy proximity. An attacker must be within physical range of the target NeoRhythm device (typically 10-100 meters depending on BLE capabilities and environmental factors).
The attack methodology involves:
- Scanning for NeoRhythm BLE advertisements in the vicinity
- Establishing an unauthorized BLE connection to the target device
- Accessing device functions without authentication
- Potentially manipulating PEMF therapy settings or extracting stored data
Due to the high complexity nature of this vulnerability, successful exploitation requires understanding of the BLE protocol implementation and device-specific communication patterns. For additional technical details, see the Radio Document on NeoRhythm.
Detection Methods for CVE-2026-2756
Indicators of Compromise
- Unexpected BLE connections to NeoRhythm devices from unknown MAC addresses
- Unauthorized changes to device settings or therapy configurations
- Unusual BLE scanning activity targeting NeoRhythm device advertisements
- Device behavior anomalies such as unexpected activation or setting modifications
Detection Strategies
- Monitor BLE connection logs for connections from unauthorized or unknown devices
- Implement network monitoring for unusual Bluetooth activity patterns in areas where NeoRhythm devices are deployed
- Deploy endpoint detection solutions capable of monitoring Bluetooth communications
- Audit device configurations regularly for unauthorized changes
Monitoring Recommendations
- Maintain an inventory of authorized devices that should connect to NeoRhythm devices
- Enable logging on any gateway or mobile applications that interface with the devices
- Review the VulDB CTI Report #352383 for updated threat intelligence
How to Mitigate CVE-2026-2756
Immediate Actions Required
- Limit physical access to areas where NeoRhythm devices are operated to reduce exposure to adjacent network attacks
- Disable Bluetooth functionality on devices when not actively in use for therapy sessions
- Monitor for any firmware updates from OmniPEMF that may address this vulnerability
- Consider isolating NeoRhythm devices from other BLE-enabled equipment
Patch Information
No official patch is currently available from OmniPEMF. The vendor was contacted early about this disclosure but did not respond. Users should monitor official OmniPEMF channels for future security updates.
Additional information is available through:
Workarounds
- Physically secure NeoRhythm devices to prevent unauthorized BLE access within proximity range
- Use the device only in trusted environments where unknown actors cannot approach within Bluetooth range
- Power off devices completely when not in use to eliminate BLE attack surface
- If possible, wrap devices in RF-shielding materials when storing to prevent unauthorized BLE connections
# No configuration-based mitigations available for this firmware-level vulnerability
# Physical security and usage restrictions are the primary workarounds
# Monitor vendor channels for firmware updates addressing authentication
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
