CVE-2026-9489: NitroSense Privilege Escalation Vulnerability

CVE-2026-9489 Overview

CVE-2026-9489 is a Local Privilege Escalation (LPE) vulnerability in Acer NitroSense versions 3.x prior to 3.01.3052. The application exposes a Windows Named Pipe that uses a custom protocol to invoke internal functions. The pipe is misconfigured and allows any authenticated local user to interact with privileged operations. Attackers can execute arbitrary code as NT AUTHORITY\SYSTEM and delete arbitrary files with SYSTEM privileges. The flaw is tracked under CWE-22 (Path Traversal).

Critical Impact

Any authenticated local user on a system running a vulnerable NitroSense 3.x build can elevate to SYSTEM and delete arbitrary files, enabling full host compromise.

Affected Products

• Acer NitroSense 3.x versions prior to 3.01.3052
• Windows endpoints with NitroSense installed and the named pipe service running
• Acer Nitro gaming laptops shipped with NitroSense pre-installed

Discovery Timeline

• 2026-05-25 - CVE-2026-9489 published to NVD
• 2026-05-26 - Last updated in NVD database

Technical Details for CVE-2026-9489

Vulnerability Analysis

NitroSense installs a privileged Windows service that exposes a Named Pipe for inter-process communication. The pipe accepts a custom protocol used to dispatch internal functions, including file operations and code execution primitives. The pipe's Discretionary Access Control List (DACL) does not restrict access to administrators or trusted callers. As a result, any authenticated local user can connect to the pipe and submit requests that the service executes in the SYSTEM security context.

Two primitives are exposed: arbitrary code execution as SYSTEM and arbitrary file deletion as SYSTEM. Arbitrary file deletion as SYSTEM is a well-known stepping stone to full LPE through techniques that abuse Windows Installer rollback or trusted directory manipulation. The path traversal classification (CWE-22) indicates that file path inputs accepted by the pipe are not normalized or constrained to a safe directory.

Root Cause

The root cause is improper access control on the Named Pipe combined with insufficient validation of path arguments passed through the custom protocol. The service trusts the caller's input and operates with SYSTEM privileges, violating the principle of least privilege.

Attack Vector

Exploitation requires local access and low-privilege authentication. No user interaction is needed. An attacker connects to the NitroSense Named Pipe, sends a crafted protocol message referencing a target path or payload, and the service executes the operation as SYSTEM. The technical mechanics are described in the Acer Knowledge Base Article.

Detection Methods for CVE-2026-9489

Indicators of Compromise

• Unexpected child processes spawned by the NitroSense service binary running as NT AUTHORITY\SYSTEM
• Named Pipe connections to the NitroSense pipe originating from non-administrative user sessions
• Deletion of files in protected directories such as C:\Windows\System32 or C:\Program Files performed by the NitroSense service
• Installed NitroSense build identifying as a version below 3.01.3052

Detection Strategies

• Inventory all endpoints for NitroSense installations and flag versions earlier than 3.01.3052
• Hunt for process creation events where the parent process is the NitroSense service and the child is cmd.exe, powershell.exe, or other interpreters
• Correlate Named Pipe access events (Windows Event ID 5145) with subsequent privileged file operations

Monitoring Recommendations

• Enable Sysmon Event ID 17 and 18 to log Named Pipe creation and connection activity
• Monitor service-initiated file deletions in system directories using auditing of object access
• Alert on any low-privileged user session triggering SYSTEM-context process creation

How to Mitigate CVE-2026-9489

Immediate Actions Required

• Upgrade NitroSense to version 3.01.3052 or later on all affected Acer endpoints
• Restrict local logon rights on systems where NitroSense cannot be patched immediately
• Audit and remove NitroSense from systems that do not require the utility

Patch Information

Acer has released NitroSense 3.01.3052 to address the vulnerability. Refer to the Acer Knowledge Base Article for download instructions and verification steps. Apply the update through standard endpoint management tooling and verify the installed version after deployment.

Workarounds

• Stop and disable the NitroSense Windows service until the patch is applied
• Uninstall NitroSense on endpoints where the utility is not required for hardware management
• Apply application control policies to block execution of vulnerable NitroSense binaries

# Verify the installed NitroSense version on a Windows endpoint
Get-WmiObject -Class Win32_Product | Where-Object { $_.Name -like "*NitroSense*" } | Select-Object Name, Version

# Stop and disable the NitroSense service as a temporary workaround
Stop-Service -Name "NitroSenseService" -Force
Set-Service -Name "NitroSenseService" -StartupType Disabled