CVE-2025-9869 is a local privilege escalation vulnerability affecting Razer Synapse 3, specifically version 3.10.228.21112. The root cause is an improper link resolution vulnerability (CWE-59) within the Razer Synapse Service's macro module. The service improperly follows symbolic links created by an attacker, which can be abused to delete arbitrary files on the system. By leveraging this flaw, an attacker who already has low-level code execution capabilities on the machine can escalate their privileges to SYSTEM level, gaining full control over the system. The vulnerability does not require user interaction but does require local access with limited privileges. The CVSS v3.0 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The vulnerability was assigned by ZDI (ZDI-CAN-26374) and published on October 29, 2025. No patches or exploits are currently publicly available, but the risk is significant given the potential for full system compromise. The flaw highlights the dangers of improper symbolic link handling in privileged services.

If exploited, this vulnerability allows an attacker with limited local access to escalate privileges to SYSTEM level, effectively gaining full control over the affected machine. This can lead to complete compromise of confidentiality, integrity, and availability of the system. Attackers could install persistent malware, steal sensitive data, disable security controls, or disrupt system operations. Since Razer Synapse 3 is commonly used on gaming and high-performance PCs, affected systems could include both consumer and enterprise endpoints, especially in environments where Razer hardware is prevalent. The requirement for local code execution limits remote exploitation but does not eliminate risk, as attackers often gain initial footholds through other means such as phishing or software vulnerabilities. The lack of known exploits in the wild currently reduces immediate risk, but the vulnerability’s high severity score indicates it is a critical issue once weaponized.

Organizations should monitor Razer’s official channels for patches addressing this vulnerability and apply them promptly once released. Until a patch is available, restrict local user permissions to prevent unauthorized code execution and symbolic link creation. Employ application whitelisting and endpoint detection to identify suspicious activities related to symbolic link manipulation or file deletion by the Razer Synapse Service. Consider uninstalling or disabling Razer Synapse 3 on systems where it is not essential, especially in high-security environments. Conduct regular audits of local user privileges and monitor for unusual file system changes. Additionally, implement robust endpoint protection solutions capable of detecting privilege escalation attempts and anomalous service behaviors. Network segmentation can also limit the spread of compromise from affected endpoints.