CVE-2025-9869 is a local privilege escalation vulnerability affecting Razer Synapse 3, specifically version 3.10.228.21112. The vulnerability stems from improper link resolution before file access (CWE-59) within the Razer Synapse Service. An attacker who has already gained the ability to execute code with low privileges on the system can exploit this flaw by creating a symbolic link (symlink) that the service follows improperly. This leads to the deletion of arbitrary files, which can be leveraged to escalate privileges to SYSTEM level. The flaw allows an attacker to execute arbitrary code in the context of the highest system privileges, effectively compromising the entire system. The vulnerability does not require user interaction but does require local access and some level of code execution capability. The CVSS v3.0 score is 7.8, reflecting high impact on confidentiality, integrity, and availability, with low attack complexity and low privileges required. There are no known exploits in the wild yet, and no official patches have been linked at the time of publication. The vulnerability was assigned by ZDI (Zero Day Initiative) under ZDI-CAN-26374 and was publicly disclosed on October 29, 2025.

For European organizations, this vulnerability poses a significant risk especially in environments where Razer Synapse 3 is installed, such as gaming companies, esports organizations, and enterprises with employees using Razer peripherals managed by Synapse. Successful exploitation leads to SYSTEM-level compromise, allowing attackers to bypass security controls, access sensitive data, install persistent malware, or disrupt operations by deleting critical files. This can result in data breaches, operational downtime, and loss of trust. Since the vulnerability requires local code execution, it is particularly dangerous in scenarios where attackers can gain initial footholds through phishing, malicious downloads, or insider threats. The high severity and potential for complete system compromise make it a critical concern for IT security teams. Additionally, the lack of current exploits in the wild provides a window for proactive mitigation before widespread attacks occur.

1. Restrict local user permissions to prevent unauthorized code execution and symbolic link creation. 2. Implement application whitelisting and endpoint protection to detect and block attempts to create malicious symlinks or manipulate the Razer Synapse Service. 3. Monitor file system activity for unusual symbolic link creation or deletion of critical files associated with Razer Synapse. 4. Isolate systems running Razer Synapse 3 from sensitive networks where possible to limit lateral movement. 5. Educate users about the risks of executing untrusted code and enforce strict controls on software installation. 6. Regularly check for and apply official patches or updates from Razer as soon as they become available. 7. Consider temporarily uninstalling or disabling Razer Synapse 3 on critical systems if patching is delayed and risk is unacceptable. 8. Employ robust logging and alerting mechanisms to detect exploitation attempts early.