CVE-2025-14693 is a vulnerability identified in the Ugreen DH2100+ device firmware versions up to 5.3.0, specifically within an unspecified function of the USB Handler component. The vulnerability allows an attacker with physical access to the device to exploit symlink following behavior. Symlink following occurs when the system improperly handles symbolic links, potentially allowing an attacker to redirect file operations to unintended locations. This can lead to unauthorized access, modification, or deletion of files, compromising the device's confidentiality, integrity, and availability. The attack vector requires physical access and low privileges but does not require user interaction, making it relatively straightforward to exploit in environments where the device is accessible. The CVSS 4.0 score is 7 (high severity), reflecting the significant impact on all three security properties (confidentiality, integrity, availability) and the low complexity of the attack. The vendor was notified early but has not responded or issued patches, and no known exploits have been observed in the wild yet. The public disclosure increases the risk of exploitation by malicious actors. The vulnerability's exploitation could allow attackers to manipulate device behavior, potentially leading to data leakage, device malfunction, or further compromise of connected systems. The lack of patch availability necessitates immediate mitigation efforts to reduce exposure.

For European organizations, especially those using Ugreen DH2100+ devices in operational technology, industrial control systems, or sensitive IT environments, this vulnerability poses a significant risk. Exploitation could lead to unauthorized data access or modification, disruption of device functionality, and potential lateral movement within networks. The requirement for physical access limits remote exploitation but does not eliminate risk in environments where devices are accessible to insiders or visitors. Critical infrastructure sectors such as manufacturing, healthcare, and telecommunications that rely on these devices could experience operational disruptions or data breaches. The absence of vendor response and patches increases the window of vulnerability, potentially attracting attackers targeting European entities. Additionally, regulatory compliance frameworks in Europe, such as GDPR and NIS2, may impose penalties if organizations fail to adequately protect against known vulnerabilities, increasing the legal and financial impact.

1. Immediately restrict physical access to Ugreen DH2100+ devices by implementing strict access controls and surveillance in areas where these devices are deployed. 2. Isolate affected devices from critical networks to limit potential lateral movement if exploitation occurs. 3. Monitor device logs and network traffic for unusual activity indicative of exploitation attempts or unauthorized access. 4. Employ endpoint detection and response (EDR) solutions capable of detecting anomalous file system operations related to symlink manipulation. 5. Maintain an inventory of all Ugreen DH2100+ devices and track firmware versions to identify vulnerable units. 6. Engage with Ugreen or authorized resellers to seek firmware updates or official guidance, and consider alternative hardware if no patch is forthcoming. 7. Educate staff about the risks of physical device tampering and enforce policies to prevent unauthorized device handling. 8. Prepare incident response plans specific to physical device compromise scenarios. 9. Consider deploying hardware-based security controls such as USB port locks or tamper-evident seals. 10. Stay informed on threat intelligence updates regarding this vulnerability and any emerging exploits.