CVE-2025-63945 is a privilege escalation vulnerability affecting the Tencent iOA application on Windows platforms up to version 210.9.28693.621001. The flaw arises from a race condition that a local attacker can exploit to execute arbitrary code with elevated privileges, bypassing normal access controls. This race condition likely involves improper synchronization or timing issues in the application's handling of privileged operations or resources, categorized under CWE-59 (Improper Link Resolution Before File Access). Successful exploitation requires local access and precise timing to trigger the race condition, making it a complex attack vector. The vulnerability impacts confidentiality, integrity, and availability by allowing unauthorized privilege escalation, potentially enabling attackers to install malware, access sensitive data, or disrupt system operations. Although no public exploits have been reported, the high CVSS score (7.4) reflects the significant risk if exploited. No patches or mitigations have been officially released, emphasizing the need for defensive measures until a fix is available.

If exploited, this vulnerability enables a local attacker to gain elevated privileges on affected Windows devices running Tencent iOA, potentially leading to full system compromise. This can result in unauthorized access to sensitive information, installation of persistent malware, disruption of critical services, and lateral movement within networks. Organizations relying on Tencent iOA for internal workflows or document management face increased risk of insider threats or attacks leveraging compromised user accounts. The vulnerability's exploitation complexity limits widespread attacks but does not eliminate risk, especially in environments with many local users or shared workstations. The absence of known exploits reduces immediate threat but also means attackers may develop exploits in the future. Overall, the impact is high due to the broad consequences of privilege escalation in enterprise environments.

Organizations should immediately restrict local access to Windows devices running Tencent iOA to trusted users only, minimizing the attack surface. Employ strict user account control policies and limit administrative privileges to reduce the impact of potential exploitation. Monitor system logs and behavior for unusual activity indicative of race condition exploitation attempts. Use application whitelisting and endpoint detection and response (EDR) solutions to detect and block unauthorized privilege escalation attempts. Since no official patch is available, consider isolating or temporarily disabling Tencent iOA on critical systems if feasible. Engage with Tencent support channels to obtain updates or workarounds. Educate users about the risks of local privilege escalation and enforce strong physical security controls to prevent unauthorized local access.