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A proposed class action accuses University Hospitals of negligence after an October 22 cyberattack that took its MyChart portal offline; the Cleveland patient's suit, filed October 28, claims more than a million records were exposed, a number University Hospitals has not confirmed. University of New Mexico Health Sciences Center disclosed a cyberattack October 26 that diverted ambulances for about two hours; the BYOD extortion group claims it compromised 36,000 systems, a figure UNM has not confirmed. Philips updated its Node2Shell advisory October 27 for CVE-2026-111497, the Node.js Brotli decoder flaw it first flagged October 26 against PIC iX 4.x; the advisory still names no impacted products or fixed version. Philips updated its PHP2Shell advisory October 27 for CVE-2026-109618 and CVE-2026-109619, adding five more affected products including IntelliSpace Portal V12 and Philips Axon to the seven already listed. NorthShore Health Centers disclosed a data breach to patients October 27, one of several Midwest provider notifications issued that week. Denver Health Medical Plan notified more than 238,000 members October 26 about a vendor-related data incident. A proposed class action accuses University Hospitals of negligence after an October 22 cyberattack that took its MyChart portal offline; the Cleveland patient's suit, filed October 28, claims more than a million records were exposed, a number University Hospitals has not confirmed. University of New Mexico Health Sciences Center disclosed a cyberattack October 26 that diverted ambulances for about two hours; the BYOD extortion group claims it compromised 36,000 systems, a figure UNM has not confirmed. Philips updated its Node2Shell advisory October 27 for CVE-2026-111497, the Node.js Brotli decoder flaw it first flagged October 26 against PIC iX 4.x; the advisory still names no impacted products or fixed version. Philips updated its PHP2Shell advisory October 27 for CVE-2026-109618 and CVE-2026-109619, adding five more affected products including IntelliSpace Portal V12 and Philips Axon to the seven already listed. NorthShore Health Centers disclosed a data breach to patients October 27, one of several Midwest provider notifications issued that week. Denver Health Medical Plan notified more than 238,000 members October 26 about a vendor-related data incident.
Saturday, October 31, 2026 Issue #499  ·  Est. 2025
Independent brief for device makers
Manufacturers // iRhythm // Products

Zio AT device

Detector And Alarm, Arrhythmia. Attributes come from iRhythm's own public documentation for this product.

Attributes

Signals
Mobile app User accounts Web interface Handles patient data Cloud connectivity Remote access Wireless connectivity Physiological waveform processing Home use
Properties (MITRE EMB3D)
PID-31 Application-level software is present and running on the device PID-33 Device includes interactive applications, services, or user interfaces PID-332 Device includes authenticated services PID-41 Device exposes remote network services
Attributes: component types
Battery Cloud Service Generic Application Generic Hardware Local Application Local Service Mobile Application Sensor Modules User Interface Web Application
Attributes: interface types
Bluetooth Cellular Wireless
Attributes: assets
Report Data Sensor Data Telemetry Data User Data
Attributes: dataflows
Zio AT patch to Zio AT wireless gateway over Bluetooth (ECG data) Zio AT patch to monitoring center (returned patch for analysis and end-of-wear reporting) Zio AT wireless gateway to monitoring service over cellular (ECG data)

Matched threat intel

9

Advisories in our coverage that share an attribute with this product. A shared attribute is a lead, not a finding. The status column shows only what iRhythm has said.

AdvisoryDateSharediRhythm status
Flow Neuroscience FL-100 ships a shared Bluetooth credential in every unitAug 13, 2026Same attributes (interface and component types)Bluetooth, Mobile ApplicationNo feedback feed from manufacturer
Mira’s cloud login accepted any password and returned a session tokenAug 11, 2026Same attributes (interface and component types)Bluetooth, Mobile ApplicationNo feedback feed from manufacturer
Medtronic MyCareLink Smart 25000 reader allows Bluetooth authentication bypass and unsigned firmwareDec 10, 2020Same attributes (interface and component types)Bluetooth, Cloud ServiceNo feedback feed from manufacturer
Apollo Pharmacy APG-01 BT glucose meter sends readings over BLE in cleartextJun 18, 2026Same signalsNo feedback feed from manufacturer
Missing authentication lets an attacker rewrite a cardiac wearableMay 28, 2026Same signalsNo feedback feed from manufacturer
BPL PWS-01-BT weighing scale sends unencrypted, unauthenticated BLE data to the Be Well appSep 10, 2024Same signalsNo feedback feed from manufacturer
Fresenius lists Conox anesthesia monitor as affected by BLUFFS Bluetooth flawApr 10, 2024Same signalsNo feedback feed from manufacturer
Philips Veradius Unity, Pulsera and Endura Dual WAN routers use weak encryptionDec 19, 2019Same signalsNo feedback feed from manufacturer
Smiths Medical Medfusion 4000 syringe pump ships hard-coded wireless, FTP and Telnet credentialsSep 7, 2017Same signalsNo feedback feed from manufacturer

Threats and weaknesses in matched advisories

MITRE EMB3D threats
TID-213 Faulty FW/SW Update Integrity Verification TID-224 Excessive Access via Software Diagnostic Features TID-310 Remotely Accessible Unauthenticated Services TID-311 Default Credentials TID-313 Unauthenticated Session Changes Credential TID-314 Passwords Can Be Guessed Using Brute-Force Attempts TID-316 Incorrect Certificate Verification Allows Authentication Bypass TID-327 Out of Bounds Memory Access TID-328 Hardcoded Credentials TID-329 Improper Password Storage TID-401 Undocumented Protocol Features TID-404 Remotely Triggerable Deadlock/DoS TID-406 Unauthorized Messages or Connections TID-407 Missing Message Replay Protection TID-408 Unencrypted Sensitive Data Communication TID-411 Weak/Insecure Cryptographic Protocol
CWE weaknesses
CWE-1390 Weak Authentication CWE-1392 Use of Default Credentials CWE-287 Improper Authentication CWE-290 Authentication Bypass by Spoofing CWE-294 Authentication Bypass by Capture-replay CWE-306 Missing Authentication for Critical Function CWE-319 Cleartext Transmission of Sensitive Information CWE-326 Inadequate Encryption Strength CWE-522 Insufficiently Protected Credentials CWE-798 Use of Hard-coded Credentials