CVE-2025-7118 is a critical buffer overflow vulnerability identified in the UTT HiPER 840G device, specifically affecting versions up to 3.1.1-190328. The vulnerability arises from improper handling of the 'importpictureurl' argument within the /goform/formPictureUrl endpoint. An attacker can remotely send a specially crafted request manipulating this argument to trigger a buffer overflow condition. This type of vulnerability can lead to arbitrary code execution, denial of service, or system compromise without requiring user interaction or authentication. The CVSS 4.0 score of 8.7 reflects a high severity, with attack vector being network-based (AV:N), low attack complexity (AC:L), no privileges required (PR:L), and no user interaction needed (UI:N). The impact on confidentiality, integrity, and availability is high, indicating potential full system compromise. The vendor has been contacted but has not responded or provided a patch, and while no exploits are currently known to be in the wild, the public disclosure of the exploit increases the risk of exploitation. The vulnerability affects a specific processing routine related to image URL import functionality, which suggests that the device’s web interface or API is vulnerable to remote exploitation. The lack of vendor response and patch availability increases the urgency for affected organizations to implement mitigations.

For European organizations using UTT HiPER 840G devices, this vulnerability poses a significant risk. Given the device’s likely role in network infrastructure or specialized industrial or communication environments, exploitation could lead to unauthorized remote code execution, enabling attackers to gain control over affected devices. This could result in data breaches, disruption of critical services, or pivoting within internal networks. The high impact on confidentiality, integrity, and availability means sensitive data could be exposed or manipulated, and service outages could occur. The absence of vendor patches and the public availability of exploit details increase the likelihood of targeted attacks, especially against organizations relying on these devices for critical operations. European entities in sectors such as telecommunications, manufacturing, or infrastructure that deploy UTT HiPER 840G are particularly at risk, potentially affecting operational continuity and regulatory compliance under frameworks like GDPR.

Given the lack of official patches, European organizations should take immediate and specific actions: 1) Isolate affected UTT HiPER 840G devices from untrusted networks, limiting exposure to the internet or untrusted LAN segments. 2) Implement strict network segmentation and firewall rules to restrict access to the /goform/formPictureUrl endpoint, allowing only trusted management hosts. 3) Monitor network traffic for anomalous requests targeting the importpictureurl parameter, employing intrusion detection/prevention systems (IDS/IPS) with custom signatures tailored to detect exploit attempts. 4) Where possible, disable or restrict the vulnerable functionality related to image URL imports if it is not essential. 5) Maintain heightened logging and alerting on these devices to detect exploitation attempts early. 6) Engage with UTT or third-party security vendors for potential unofficial patches or workarounds. 7) Plan for device replacement or upgrade to unaffected versions once available. 8) Conduct internal audits to identify all instances of the affected product and assess exposure.