CVE-2026-95699: MrSteam iSteamX Improper Isolation or Compartmentalization
Prior to 9/18/2026, the iSteamX mobile application's AWS policy could grant authenticated users access to wildcard MQTT topics, which can expose other users' device data and allow the attacker to start and stop other connected users' devices. This risked exposing user profile information and potential scalding due to unintended device activation.
Affected Software
Event History
Frequently Asked Questions
Who could exploit this issue?
An attacker would need to be an authenticated iSteamX mobile application user. The affected AWS policy could then allow access to wildcard MQTT topics associated with other users' connected devices.
What could an attacker do through the exposed MQTT access?
They could potentially access other users' device data and start or stop other users' connected devices. Exposed information could include user profile data, and unintended device activation could create a scalding risk.
Are unauthenticated internet users affected?
The available information describes access by authenticated users, not unauthenticated access. No additional account or device-access prerequisites are provided.
What time period is affected?
The issue is described as affecting the iSteamX mobile application's AWS policy prior to September 18, 2026. The provided information does not identify affected application versions or confirm a specific remediation version.