CVE-2026-50607: Acer NitroSense Information Disclosure Flaw

CVE-2026-50607 is an information disclosure vulnerability in Acer NitroSense and PredatorSense where a WebSocket service listens on all network interfaces, potentially exposing system data to unauthorized access. This post covers technical details, affected versions, impact assessment, and mitigation steps.

CVE-2026-50607 Overview

CVE-2026-50607 affects the Acer System Monitoring component bundled with the NitroSense and PredatorSense utilities. The vulnerability stems from a WebSocket service configured to bind to all network interfaces (0.0.0.0) rather than the loopback address. This misconfiguration exposes an internal telemetry channel to any host that can reach the affected machine over the network. The issue is categorized under [CWE-668] Exposure of Resource to Wrong Sphere. Acer documented the issue in an Acer Community Knowledge Base Article.

Critical Impact
A local WebSocket service intended for host-only communication accepts connections from remote network peers, potentially leaking low-sensitivity system monitoring data.

Affected Products

Acer NitroSense
Acer PredatorSense
Acer System Monitoring component shipped within the above utilities

Discovery Timeline

2026-09-17 - CVE-2026-50607 published to the National Vulnerability Database
2026-09-17 - Last updated in NVD database

Technical Details for CVE-2026-50607

Vulnerability Analysis

The Acer System Monitoring component operates a WebSocket listener that supports the NitroSense and PredatorSense user-interface layers. Instead of binding the socket to 127.0.0.1, the service listens on 0.0.0.0, accepting connections from every network interface attached to the host. Any peer that can route packets to the listening port can attempt to establish a WebSocket session with the monitoring service.

The exposed channel handles hardware telemetry and control messages that were designed for trusted, host-local consumers. Because the service assumed a loopback trust boundary, remote clients may enumerate exposed endpoints and read data the component was never intended to expose beyond the machine. The CVSS 4.0 vector reports low confidentiality, integrity, and availability impact on the vulnerable system with no required privileges or user interaction.

Root Cause

The root cause is an insecure default network binding. The listening socket is initialized without restricting the accepted interface, resulting in exposure of a resource to an unintended sphere ([CWE-668]). No authentication or origin validation compensates for the broadened attack surface.

Attack Vector

An attacker on the same network segment, or one able to reach the host through a routed path or VPN, can connect directly to the WebSocket port. The attack requires no credentials and no user interaction on the target. Exploitation is limited to the data and control surface the WebSocket exposes; no evidence of code execution capability is documented in the advisory.

No verified proof-of-concept code is published for CVE-2026-50607. Refer to the Acer Community Knowledge Base Article for vendor-supplied technical detail.

Detection Methods for CVE-2026-50607

Indicators of Compromise

Unexpected inbound TCP connections to the local WebSocket port used by the Acer System Monitoring service on Acer NitroSense or PredatorSense hosts.
WebSocket Upgrade requests originating from non-loopback source addresses in host or network logs.
Presence of a listening socket bound to 0.0.0.0 for the Acer System Monitoring process on affected endpoints.

Detection Strategies

Enumerate listening sockets on Acer laptops using netstat -ano or Get-NetTCPConnection and flag any Acer System Monitoring listener not bound to 127.0.0.1.
Inspect endpoint firewall telemetry for allow rules that permit inbound traffic to the NitroSense or PredatorSense executables.
Correlate process ancestry to confirm the WebSocket listener belongs to the Acer System Monitoring service before triage.

Monitoring Recommendations

Alert on new external clients establishing WebSocket sessions with Acer utility processes.
Track software inventory for NitroSense and PredatorSense versions to prioritize patch validation.
Monitor network segments containing Acer endpoints for scanning activity targeting the affected WebSocket port.

How to Mitigate CVE-2026-50607

Immediate Actions Required

Update NitroSense and PredatorSense to the fixed version documented in the Acer Community Knowledge Base Article.
Restrict inbound access to the affected WebSocket port using the Windows host firewall until patched builds are deployed.
Inventory Acer endpoints across the environment to identify hosts running the vulnerable System Monitoring component.

Patch Information

Acer has published guidance in its Acer Community Knowledge Base Article. Administrators should apply the vendor-supplied update to versions of NitroSense and PredatorSense that ship the corrected System Monitoring component, which binds the WebSocket listener to the loopback interface.

Workarounds

Add a Windows Defender Firewall inbound block rule for the Acer System Monitoring process to prevent non-loopback connections.
Disable or uninstall NitroSense and PredatorSense on systems where hardware tuning features are not required.
Segment Acer devices from untrusted networks to reduce the population of hosts able to reach the exposed port.

bash

# Block inbound access to the Acer System Monitoring WebSocket via Windows Defender Firewall
New-NetFirewallRule -DisplayName "Block Acer System Monitoring WebSocket" `
  -Direction Inbound `
  -Program "C:\Program Files\Acer\Acer System Monitoring\SystemMonitoring.exe" `
  -Action Block `
  -Profile Any