CVE-2025-10475 is a vulnerability identified in SpyShelter, a security software product designed to protect systems from malware and keyloggers. The flaw exists in the SpyShelter.sys driver, specifically within an IOCTL (Input Output Control) handler function. This vulnerability allows a local attacker with limited privileges (PR:L) to cause a denial of service (DoS) condition by manipulating the affected IOCTL handler. The attack does not require user interaction (UI:N) and does not impact confidentiality, integrity, or availability beyond causing a service disruption (VA:H). The vulnerability is exploitable locally, meaning an attacker must have access to the system to launch the attack. The CVSS v4.0 base score is 6.8, categorized as medium severity. The vulnerability affects SpyShelter versions up to 15.4.0.1015, and upgrading to version 15.4.0.1028 mitigates the issue. Although the exploit code has been publicly released, there are no known exploits in the wild at this time. The vulnerability's impact is limited to denial of service, which could disrupt the protection mechanisms provided by SpyShelter, potentially exposing the system to further attacks if the protection software is disabled or crashes. The vulnerability does not require elevated privileges beyond limited local privileges, and no network access is involved, limiting the attack surface to local users or processes.

For European organizations, the primary impact of CVE-2025-10475 is the potential disruption of endpoint protection provided by SpyShelter. A successful local denial of service attack could disable or crash the SpyShelter driver, temporarily removing critical malware and keylogger defenses. This could increase the risk of subsequent compromise or data leakage if attackers exploit the window of reduced protection. Organizations relying on SpyShelter for endpoint security, especially those with environments where local user access is common or where insider threats exist, may face increased risk. The disruption could also affect operational continuity if the denial of service impacts critical systems or user productivity. However, since the attack requires local access and limited privileges, remote exploitation is not feasible, reducing the risk for organizations with strong access controls. The medium severity rating indicates that while the vulnerability is serious, it is not critical, but it should still be addressed promptly to maintain endpoint security integrity.

To mitigate CVE-2025-10475, European organizations should immediately upgrade SpyShelter to version 15.4.0.1028 or later, as this version contains the patch that addresses the vulnerability. Additionally, organizations should enforce strict local access controls to limit the number of users with local access and restrict the ability to execute untrusted code or commands locally. Implementing application whitelisting and endpoint detection and response (EDR) solutions can help detect and prevent attempts to exploit this vulnerability. Regularly auditing and monitoring local user activities can also reduce the risk of exploitation. Organizations should ensure that their incident response plans include procedures for handling denial of service conditions affecting endpoint protection software. Finally, educating users about the risks of local exploitation and maintaining up-to-date security software will further reduce exposure.