CVE-2025-64993 is a medium-severity command injection vulnerability identified in TeamViewer DEX, formerly known as 1E DEX, specifically within the 1E-ConfigMgrConsoleExtensions instructions. The root cause is improper input validation (CWE-20), which enables attackers who have authenticated access with Actioner privileges to inject arbitrary commands. This injection flaw allows remote execution of commands with elevated privileges on devices connected to the TeamViewer DEX platform. The vulnerability requires the attacker to be authenticated with relatively high privileges (Actioner role) and involves user interaction, which limits exploitation scope but does not eliminate risk. The CVSS v3.1 base score is 6.8, reflecting network attack vector, low attack complexity, high privileges required, and user interaction. The impact spans confidentiality, integrity, and availability, as arbitrary commands can compromise sensitive data, alter system configurations, or disrupt services. Currently, no public exploits or patches are available, indicating the vulnerability is newly disclosed and not yet actively exploited. TeamViewer DEX is used for remote device management and endpoint control, making this vulnerability critical for environments relying on centralized device orchestration. The vulnerability's presence in a widely used remote management tool underscores the importance of timely mitigation to prevent lateral movement or privilege escalation within enterprise networks.

For European organizations, this vulnerability poses significant risks, especially for enterprises and public sector entities that rely on TeamViewer DEX for remote device management. Successful exploitation could lead to unauthorized command execution on multiple connected endpoints, potentially resulting in data breaches, disruption of critical services, or deployment of further malware. The elevated privileges required mean that insider threats or compromised accounts with Actioner rights are primary risk vectors. Confidentiality could be compromised through data exfiltration, integrity through unauthorized configuration changes, and availability through service disruption or device manipulation. Given the increasing reliance on remote management tools in European critical infrastructure, manufacturing, and government sectors, the impact could extend to operational technology environments, increasing the risk of widespread operational disruption. The absence of known exploits currently provides a window for proactive defense, but the medium severity and ease of exploitation by privileged users necessitate urgent attention.

1. Restrict Actioner privileges strictly to trusted personnel and regularly review user roles within TeamViewer DEX to minimize the attack surface. 2. Implement strong authentication mechanisms such as multi-factor authentication (MFA) to reduce the risk of credential compromise for privileged accounts. 3. Monitor and audit all command executions and configuration changes within TeamViewer DEX to detect anomalous or unauthorized activities promptly. 4. Employ network segmentation to isolate devices managed by TeamViewer DEX, limiting lateral movement opportunities if exploitation occurs. 5. Apply principle of least privilege to all users and services interacting with TeamViewer DEX. 6. Stay alert for official patches or updates from TeamViewer and apply them immediately upon release. 7. Conduct regular security awareness training focusing on the risks associated with privileged access and command injection threats. 8. Use endpoint detection and response (EDR) tools to identify suspicious command execution patterns on managed devices. 9. If possible, temporarily disable or limit the use of 1E-ConfigMgrConsoleExtensions instructions until a patch is available or risk is mitigated.