CVE-2025-45586 is a vulnerability identified in the Audi UTR 2.0 (Universal Traffic Recorder 2.0) system. The flaw allows an attacker to arbitrarily overwrite files on the affected system by sending a specially crafted HTTP PUT request. This type of vulnerability typically arises from insufficient validation or improper handling of user-supplied input in the file upload or file management functionality of the device or software. By exploiting this vulnerability, an attacker could overwrite critical system files, configuration files, or application data, potentially leading to system instability, denial of service, or unauthorized code execution. The vulnerability does not specify affected versions, which suggests either a broad impact across multiple versions or insufficient version disclosure. No patch links or known exploits in the wild have been reported yet, indicating that the vulnerability is newly disclosed and may not have been actively exploited. The lack of a CVSS score means the severity must be assessed based on the nature of the vulnerability and its potential impact. The Audi UTR 2.0 is likely used in traffic monitoring or related infrastructure, which may be part of smart city or transportation management systems. The ability to overwrite files remotely without authentication (implied by the PUT request vector) increases the risk profile significantly, as it could allow attackers to disrupt traffic data collection, manipulate recorded data, or cause denial of service to critical infrastructure components.

For European organizations, especially those involved in transportation infrastructure, smart city initiatives, or traffic management, this vulnerability poses a significant risk. Successful exploitation could lead to manipulation or loss of traffic data, impacting traffic flow optimization, law enforcement monitoring, and public safety systems. Disruption of these systems could cause traffic congestion, accidents, or delays in emergency response. Additionally, if the overwritten files include system binaries or scripts, attackers could establish persistent control or cause system outages, affecting availability and integrity of traffic monitoring services. Given the increasing reliance on interconnected infrastructure in Europe, such an attack could have cascading effects on urban mobility and public safety. Furthermore, organizations may face regulatory and compliance consequences under GDPR and other data protection laws if the integrity or availability of data is compromised. The absence of known exploits currently reduces immediate risk but does not eliminate the threat, as attackers may develop exploits rapidly once the vulnerability details are public.

1. Immediate implementation of network-level access controls to restrict HTTP PUT requests to trusted sources only, ideally limiting access to management interfaces through VPNs or secure tunnels. 2. Deploy Web Application Firewalls (WAFs) or Intrusion Prevention Systems (IPS) configured to detect and block anomalous PUT requests targeting the Audi UTR 2.0 devices. 3. Conduct a thorough audit of all Audi UTR 2.0 devices to identify exposure to external networks and isolate them if possible. 4. Monitor system logs for unusual file modification activities or unexpected PUT requests. 5. Engage with the vendor or manufacturer to obtain patches or firmware updates as soon as they become available; if no patch exists, consider compensating controls such as disabling HTTP PUT methods if not required. 6. Implement strict file integrity monitoring on the devices to detect unauthorized changes promptly. 7. Incorporate this vulnerability into incident response plans, ensuring readiness to respond to potential exploitation attempts. 8. Educate operational technology (OT) and IT security teams about the vulnerability and recommended mitigations to ensure coordinated defense.