CVE-2025-46685: Dell SupportAssist Privilege Escalation

CVE-2025-46685 Overview

CVE-2025-46685 is a privilege escalation vulnerability affecting Dell SupportAssist OS Recovery versions prior to 5.5.15.1. The vulnerability stems from the creation of temporary files with insecure permissions (CWE-378), which allows a low-privileged attacker with local access to escalate their privileges on the affected system.

Dell SupportAssist OS Recovery is a pre-installed recovery tool found on Dell systems that helps users restore their operating system. Due to improper permission settings when creating temporary files, local attackers can potentially manipulate these files to gain elevated privileges on the system.

Critical Impact

Local attackers with low privileges can exploit insecure temporary file permissions to achieve privilege escalation, potentially gaining full system control on affected Dell systems.

Affected Products

• Dell SupportAssist OS Recovery versions prior to 5.5.15.1

Discovery Timeline

• January 13, 2026 - CVE-2025-46685 published to NVD
• January 13, 2026 - Last updated in NVD database

Technical Details for CVE-2025-46685

Vulnerability Analysis

This vulnerability is classified as a Creation of Temporary File With Insecure Permissions issue (CWE-378). When Dell SupportAssist OS Recovery creates temporary files during its operation, it fails to apply appropriate restrictive permissions to these files. This security oversight creates an opportunity for local attackers to interact with these temporary files in unintended ways.

The attack requires local access to the system and a low-privileged user account. While the attack complexity is high and requires user interaction, successful exploitation can have severe consequences including complete compromise of confidentiality, integrity, and availability on the affected system. The scope is changed, meaning the vulnerability can affect resources beyond the vulnerable component itself.

Root Cause

The root cause of CVE-2025-46685 lies in Dell SupportAssist OS Recovery's failure to properly set restrictive file permissions when creating temporary files. When applications create temporary files with overly permissive settings, other users or processes on the system may be able to read, modify, or replace these files. In the context of a privileged application like a recovery tool, this can lead to serious security implications.

Temporary files created by privileged processes should be placed in secure directories with appropriate access controls, using restrictive permissions that prevent other users from accessing them. The vulnerability indicates that Dell SupportAssist OS Recovery did not follow these secure coding practices.

Attack Vector

The attack vector for CVE-2025-46685 is local, meaning an attacker must have local access to the system to exploit this vulnerability. The typical attack scenario involves:

1. An attacker with a low-privileged account on a Dell system identifies temporary files created by SupportAssist OS Recovery
2. Due to insecure permissions, the attacker can read or modify these temporary files
3. By manipulating the contents of these files or replacing them entirely, the attacker can influence the behavior of the privileged recovery process
4. When the recovery tool processes the manipulated temporary files, the attacker's code or commands execute with elevated privileges

This type of attack may leverage race conditions (TOCTOU - Time-of-Check Time-of-Use) where the attacker replaces legitimate temporary files with malicious ones between the time they are created and when they are used.

Detection Methods for CVE-2025-46685

Indicators of Compromise

• Unexpected modifications to temporary files in Dell SupportAssist OS Recovery directories
• Unusual file permission changes on temporary files created by Dell recovery utilities
• Evidence of symbolic link or hard link attacks targeting Dell SupportAssist temporary directories
• Anomalous privilege escalation events correlated with Dell SupportAssist OS Recovery execution

Detection Strategies

• Monitor file system activity in temporary directories used by Dell SupportAssist OS Recovery for suspicious read/write operations by non-privileged users
• Implement file integrity monitoring on Dell SupportAssist OS Recovery installation directories and associated temporary locations
• Deploy endpoint detection rules to identify privilege escalation attempts following Dell SupportAssist execution
• Audit user access patterns to temporary files created by privileged Dell system utilities

Monitoring Recommendations

• Enable detailed file system auditing on Windows systems to capture temporary file creation and modification events
• Configure SIEM rules to correlate Dell SupportAssist process execution with subsequent privilege changes
• Monitor for symbolic link creation in temporary directories that could indicate exploitation attempts
• Track process lineage to identify suspicious child processes spawned by Dell SupportAssist OS Recovery

How to Mitigate CVE-2025-46685

Immediate Actions Required

• Update Dell SupportAssist OS Recovery to version 5.5.15.1 or later immediately
• Audit systems to identify affected Dell devices running vulnerable versions
• Restrict local access to Dell systems until patches can be applied
• Review system logs for any indicators of past exploitation attempts

Patch Information

Dell has released a security update addressing this vulnerability in Dell SupportAssist OS Recovery version 5.5.15.1. Organizations should obtain the update through official Dell support channels. For detailed patch information, refer to the Dell Security Advisory DSA-2025-456.

Workarounds

• Limit local access to affected Dell systems to only trusted users until patches are applied
• Consider temporarily disabling Dell SupportAssist OS Recovery on critical systems if the recovery functionality is not immediately needed
• Implement strict access controls on temporary directories used by Dell utilities
• Monitor affected systems closely for signs of privilege escalation attempts

# Verify Dell SupportAssist OS Recovery version on Windows
# Navigate to Control Panel > Programs and Features
# Or use PowerShell to check installed applications:
Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -like "*Dell SupportAssist*"} | Select-Object Name, Version