CVE-2025-27811 is a local privilege escalation vulnerability found in the razer_elevation_service.exe component of Razer Synapse 4, specifically up to version 4.0.86.2502180127. The vulnerability arises due to a flawed COM interface implementation within the elevation service, which is designed to run with elevated privileges. A local attacker who already has limited access to the system can exploit this vulnerability to escalate their privileges to a higher level, potentially SYSTEM or administrator-level. The vulnerability is classified under CWE-269, which relates to improper privilege management. The CVSS v3.1 base score is 7.8, indicating a high severity level. The vector string (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) shows that the attack requires local access, low attack complexity, and low privileges but no user interaction. The impact on confidentiality, integrity, and availability is high, meaning an attacker could gain full control over the affected system. No public exploits are currently known in the wild, and no patches or vendor advisories have been linked yet. This vulnerability is significant because Razer Synapse is a widely used software suite for managing Razer peripherals, and the elevation service runs with high privileges to perform device configuration tasks. Exploiting this flaw could allow attackers to bypass security controls, install persistent malware, or manipulate system settings without authorization.

For European organizations, this vulnerability poses a considerable risk, especially for those with employees or users who utilize Razer Synapse software on their workstations or gaming setups. The ability to escalate privileges locally can enable attackers to move laterally within corporate networks, bypass endpoint security controls, and gain administrative access to sensitive systems. This could lead to data breaches, unauthorized access to confidential information, and disruption of business operations. Given the high impact on confidentiality, integrity, and availability, organizations in sectors such as finance, technology, and government could face significant operational and reputational damage if exploited. Additionally, since Razer Synapse is popular among gaming and creative professionals, organizations with such user bases are at heightened risk. The lack of known exploits in the wild currently provides a window for proactive mitigation, but the presence of a high-severity vulnerability necessitates urgent attention.

Organizations should immediately inventory their endpoints to identify installations of Razer Synapse 4, particularly versions up to 4.0.86.2502180127. Until an official patch is released, consider the following mitigations: 1) Restrict local user permissions to prevent untrusted users from executing or interacting with the razer_elevation_service.exe or its COM interfaces; 2) Employ application whitelisting and endpoint protection solutions to monitor and block suspicious attempts to access or manipulate the elevation service; 3) Use Group Policy or endpoint management tools to disable or limit the use of Razer Synapse on critical systems where peripheral management is not essential; 4) Monitor system logs and security events for unusual privilege escalation attempts or COM interface usage; 5) Educate users about the risks of installing or running unauthorized software that could be exploited locally; 6) Prepare to deploy patches promptly once Razer releases an update addressing this vulnerability. Additionally, consider isolating systems with Razer Synapse from sensitive network segments to limit lateral movement in case of compromise.