CVE-2025-52521 is a vulnerability classified under CWE-64 (Improper Neutralization of Directives in Dynamically Evaluated Code) affecting Trend Micro Security (Consumer) version 17.8 on Windows platforms. The issue arises from the product's handling of Windows shortcut (.LNK) files, which are used to reference other files or directories. An attacker with local access can craft or manipulate .LNK files to exploit the link-following behavior of the security software, causing it to delete privileged files, including its own security components. This deletion can lead to a loss of critical security functionality, effectively escalating the attacker's privileges by disabling or impairing the security product. The vulnerability requires low attack complexity and only low privileges, with no user interaction needed, making it a potent local privilege escalation vector. The CVSS v3.1 score of 7.8 reflects high impact on confidentiality, integrity, and availability, as the attacker can compromise the system's security posture. No public exploits are known yet, but the vulnerability's nature suggests it could be leveraged in targeted local attacks or by malware that gains initial local foothold. The lack of available patches at the time of publication necessitates immediate mitigation efforts by affected users and organizations.

The impact of CVE-2025-52521 is significant for organizations and individual users running Trend Micro Security (Consumer) version 17.8 on Windows. Successful exploitation allows a local attacker to delete privileged security files, potentially disabling or impairing the security product. This can lead to a full compromise of system confidentiality, as malware or attackers can operate undetected; integrity, as security controls are bypassed or disabled; and availability, as critical security components may be removed or corrupted. For organizations, this vulnerability could facilitate lateral movement, privilege escalation, and persistence by adversaries who have gained limited local access. It also increases the risk of further attacks, data breaches, or ransomware infections due to the loss of endpoint protection. The requirement for local access limits remote exploitation but does not eliminate risk, especially in environments with multiple users or where attackers can gain initial local foothold through other means. The absence of known exploits currently reduces immediate widespread risk but does not preclude targeted attacks or future exploit development.

To mitigate CVE-2025-52521, organizations and users should: 1) Immediately restrict local user permissions to the minimum necessary, preventing untrusted users from manipulating .LNK files or accessing Trend Micro's installation directories. 2) Monitor file system activity for unusual deletions or modifications of Trend Micro security files, using endpoint detection and response (EDR) tools or native Windows auditing. 3) Isolate or limit local user environments where possible, such as through application whitelisting or sandboxing, to reduce the risk of malicious .LNK file execution. 4) Educate users about the risks of opening or interacting with suspicious shortcut files, even locally. 5) Regularly check for and apply vendor patches or updates as soon as they are released, as no patches were available at the time of disclosure. 6) Consider deploying additional layered security controls that do not rely solely on the affected Trend Micro product to maintain protection during remediation. 7) Conduct vulnerability scanning and penetration testing to identify any local privilege escalation risks in the environment. These steps go beyond generic advice by focusing on controlling local file manipulation, monitoring specific security product files, and preparing for patch deployment.