CVE-2025-41668: Path Traversal Vulnerability Explained

CVE-2025-41668 Overview

CVE-2025-41668 is a link following vulnerability ([CWE-59]) affecting the security-profile service. A low privileged remote attacker with file access can replace a critical file or folder used by the service to gain read, write, and execute access to any file on the device. The flaw allows attackers to escalate privileges and compromise file system integrity through symbolic link manipulation. CERT@VDE coordinated the disclosure under advisory VDE-2025-054.

Critical Impact
An authenticated remote attacker can achieve full read, write, and execute access to arbitrary files on the affected device, leading to privilege escalation and complete system compromise.

Affected Products

Devices running the security-profile service referenced in CERT@VDE advisory VDE-2025-054
See the CERT@VDE Advisory VDE-2025-054 for the authoritative list of affected products and versions

Discovery Timeline

2025-07-08 - CVE-2025-41668 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-41668

Vulnerability Analysis

The vulnerability resides in the security-profile service, which references files and folders without adequately validating their type or target. The service operates with elevated privileges and performs file operations on paths an attacker can influence. An attacker who has the ability to write files on the device can replace one of these critical paths with a symbolic link or junction pointing to an arbitrary destination.

When the privileged service later accesses the manipulated path, it follows the link and performs read, write, or execute operations against the attacker-chosen target. This breaks the boundary between the unprivileged user context and the privileged service, enabling tampering with system binaries, configuration files, and credentials.

The weakness is classified under [CWE-59] (Improper Link Resolution Before File Access). Exploitation requires only low privileges and no user interaction, and the attack can be delivered over the network.

Root Cause

The security-profile service does not validate whether files and folders it operates on are regular objects owned by trusted accounts. It dereferences symbolic links instead of refusing to follow them or canonicalizing paths against an allow list. This design flaw permits a low-privileged actor with write access to substitute legitimate targets with links to sensitive locations.

Attack Vector

Exploitation requires network reach to the device and an authenticated low-privileged session with file write access. The attacker replaces a file or directory consumed by the security-profile service with a symbolic link pointing to a sensitive target, such as a configuration file, system binary, or credential store. When the service performs its next file operation, the kernel follows the link and the privileged process reads, writes, or executes the attacker-selected target.

No verified public proof-of-concept is currently available. Refer to the CERT@VDE Advisory VDE-2025-054 for vendor technical details.

Detection Methods for CVE-2025-41668

Indicators of Compromise

Unexpected symbolic links or junctions inside directories used by the security-profile service
File modifications to system binaries, configuration files, or credential stores performed by the security-profile process context
New or modified files owned by privileged accounts but originating from low-privileged user sessions
Authentication events for low-privileged accounts followed by changes to security-sensitive paths

Detection Strategies

Monitor file integrity on directories and files consumed by the security-profile service and alert on type changes from regular file to symlink
Audit process execution and file access events generated by the security-profile service for paths outside its expected working set
Correlate low-privileged remote logins with subsequent privileged file write operations on the same host

Monitoring Recommendations

Enable verbose file system auditing on paths referenced by the security-profile service and ship events to a centralized analytics platform
Track creation of symbolic links by non-administrative users and treat creation in service-owned directories as high severity
Baseline normal behavior of the security-profile service and alert on deviations such as access to /etc, /root, or equivalent sensitive locations

How to Mitigate CVE-2025-41668

Immediate Actions Required

Apply the vendor-supplied patch referenced in CERT@VDE advisory VDE-2025-054 as soon as it is available for your product
Restrict network access to the management interfaces of affected devices to trusted administrative networks only
Audit and revoke unnecessary file write privileges granted to low-privileged remote accounts
Review device file systems for unauthorized symbolic links in directories used by the security-profile service

Patch Information

Consult the CERT@VDE Advisory VDE-2025-054 for fixed firmware versions and vendor-specific remediation instructions. Apply updates following the vendor's change management procedures and validate the security-profile service operates correctly after patching.

Workarounds

Disable the security-profile service on devices where it is not required for operation
Enforce strict access control lists on directories consumed by the service so only trusted administrative accounts can write to them
Segment affected devices on isolated network zones to reduce the population of low-privileged actors with reachability
Monitor for and remove unauthorized symbolic links in service-controlled directories until patches are deployed

bash

# Configuration example: find symbolic links in directories consumed by the service
find /path/to/security-profile -xdev -type l -ls

# Restrict write access on service-owned directories to root only
chown -R root:root /path/to/security-profile
chmod -R go-w /path/to/security-profile