CVE-2025-68947 identifies a missing authorization vulnerability (CWE-862) in the NSecsoft NSecKrnl Windows driver. NSecKrnl is a kernel-mode driver that facilitates certain system-level operations. The vulnerability allows a local attacker with low privileges to send specially crafted IOCTL (Input Output Control) requests to the driver, bypassing authorization checks. This enables the attacker to terminate processes owned by other users, including highly privileged SYSTEM processes and Protected Processes, which are normally shielded from termination to maintain system stability and security. The flaw arises because the driver fails to verify whether the requesting user has sufficient permissions to perform process termination operations. Exploiting this vulnerability does not require user interaction but does require local authenticated access, limiting remote exploitation. The CVSS v3.1 score of 4.7 reflects the medium severity, with attack vector local (AV:L), high attack complexity (AC:H), low privileges required (PR:L), no user interaction (UI:N), unchanged scope (S:U), and impact limited to availability (A:H) without affecting confidentiality or integrity. No patches or known exploits are currently available, but the vulnerability poses a risk of denial of service or disruption by terminating critical system processes.

For European organizations, this vulnerability could lead to significant operational disruption. The ability to terminate SYSTEM and Protected Processes can cause system instability, crashes, or denial of service, impacting availability of critical services. Organizations relying on NSecsoft NSecKrnl in security, monitoring, or system management roles may experience outages or degraded performance. Although exploitation requires local access, insider threats or attackers who gain initial foothold on a system could leverage this vulnerability to escalate privileges or disrupt operations. This is particularly concerning for sectors with high availability requirements such as finance, healthcare, and critical infrastructure. The lack of confidentiality or integrity impact reduces the risk of data breaches, but availability impact alone can cause severe business interruptions. The medium severity rating suggests prioritizing mitigation but not immediate emergency response unless combined with other vulnerabilities or active exploitation.

1. Restrict local access to systems running NSecKrnl to trusted users only, minimizing the risk of local exploitation. 2. Implement strict user account controls and monitoring to detect unauthorized local access attempts. 3. Monitor and log IOCTL requests to the NSecKrnl driver for unusual or suspicious activity indicative of crafted termination commands. 4. Apply principle of least privilege to limit user permissions on affected systems, reducing the pool of potential attackers. 5. Coordinate with NSecsoft for timely release and deployment of patches or driver updates addressing the missing authorization checks. 6. Employ endpoint detection and response (EDR) tools capable of detecting anomalous process termination activities. 7. Conduct regular security audits and penetration testing focusing on local privilege escalation vectors. 8. Educate system administrators and security teams about this vulnerability to enhance detection and response readiness.