CVE-2025-15584 is a medium-severity vulnerability identified in the Netskope Endpoint Data Loss Prevention (DLP) Module for the Netskope Client on Windows systems. The root cause is an integer overflow or wraparound (CWE-190) within the filter communication port of the Endpoint DLP module. An unprivileged local user can exploit this flaw by sending specially crafted input to the communication port, causing the integer value to overflow. This overflow leads to memory corruption that triggers a system crash, manifesting as a Blue Screen of Death (BSOD). The vulnerability requires the Endpoint DLP module to be enabled in the client configuration and local access with low privileges; no authentication or user interaction is necessary. The CVSS 4.0 vector (AV:L/AC:L/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N) reflects that the attack is local, requires low complexity, low privileges, no user interaction, and results in high impact on availability (denial-of-service). No known exploits have been reported in the wild, and no patches have been released at the time of publication. The vulnerability affects all versions of the Endpoint DLP module as indicated. The flaw could be leveraged by malicious insiders or attackers with local access to disrupt endpoint availability, potentially impacting business operations. The technical details emphasize the need for careful input validation and integer handling within the filter communication port to prevent overflow conditions.

The primary impact of CVE-2025-15584 is a denial-of-service condition on Windows endpoints running the Netskope Endpoint DLP module. Successful exploitation causes a system crash (BSOD), which disrupts endpoint availability and can lead to loss of unsaved data and interruption of user productivity. For organizations relying on Netskope Endpoint DLP for data loss prevention, this vulnerability could be exploited by local attackers or malicious insiders to disable endpoint protection temporarily or cause operational disruptions. Although the vulnerability does not allow privilege escalation or remote code execution, the loss of endpoint availability can affect security monitoring and compliance enforcement. In environments with high endpoint density, widespread exploitation could lead to significant operational impact. The lack of known exploits reduces immediate risk, but the medium severity and ease of local exploitation warrant proactive mitigation. Enterprises with strict uptime requirements or critical endpoint roles may face increased risk from this vulnerability.

To mitigate CVE-2025-15584, organizations should: 1) Monitor Netskope advisories closely and apply patches or updates promptly once released. 2) Restrict local access to endpoints running the Netskope Endpoint DLP module to trusted users only, minimizing the risk of unprivileged exploitation. 3) Employ endpoint hardening techniques such as application whitelisting and least privilege policies to limit the ability of unprivileged users to interact with the filter communication port. 4) Implement monitoring and alerting for unusual local activity or crashes related to the Netskope client. 5) Consider temporarily disabling the Endpoint DLP module if operationally feasible until a patch is available, balancing security and availability needs. 6) Conduct internal audits to identify systems with the vulnerable module enabled and prioritize remediation efforts. 7) Educate users and administrators about the risk of local exploitation and the importance of endpoint security hygiene. These specific steps go beyond generic advice by focusing on controlling local access and monitoring the specific component affected.