Overview
CVE-2025-12852 describes a DLL loading vulnerability found in all versions of NEC Corporation’s RakurakuMusen Start EX software. This vulnerability allows an attacker to manipulate the PC environment, potentially leading to unintended and malicious operations on the user’s device.
Technical Details
DLL (Dynamic Link Library) loading vulnerabilities occur when an application loads a DLL without properly validating its source or integrity. In the case of CVE-2025-12852, RakurakuMusen Start EX appears to be susceptible to loading a malicious DLL placed in a predictable or attacker-controlled location. By exploiting this, an attacker can inject arbitrary code into the application’s process, leading to various malicious outcomes.
The exact mechanism and the extent of the potential impact are detailed in NEC’s security advisory.
CVSS Analysis
Currently, CVE-2025-12852 has a CVSS score of N/A. This likely indicates that the severity and exploitability metrics are still being evaluated. However, the nature of DLL loading vulnerabilities generally suggests a significant risk, especially if exploitation is straightforward.
We will update this section as soon as a CVSS score becomes available.
Possible Impact
Successful exploitation of this vulnerability could have several serious consequences, including:
- Arbitrary Code Execution: The attacker can execute malicious code on the user’s system with the privileges of the RakurakuMusen Start EX application.
- Privilege Escalation: If the application runs with elevated privileges, the attacker could gain higher-level access to the system.
- Data Theft: The attacker could steal sensitive information stored on the compromised device.
- System Compromise: The attacker could gain complete control of the affected system.
- Malware Installation: The attacker could install malware, such as ransomware or keyloggers, on the system.
Mitigation or Patch Steps
The primary mitigation strategy is to apply the patch or update provided by NEC Corporation. Follow these steps:
- Visit the NEC security advisory (linked below) for the latest information and download links.
- Download and install the updated version of RakurakuMusen Start EX.
- Verify the installation to ensure the vulnerability is patched.
- As a general security measure, always practice safe computing habits, such as avoiding suspicious downloads and links.
