CVE-2025-10756 is a high-severity buffer overflow vulnerability identified in the UTT HiPER 840G device, specifically affecting versions up to 3.1.1-190328. The vulnerability resides in an unknown function associated with the endpoint /goform/getOneApConfTempEntry, where manipulation of the 'tempName' argument can trigger a buffer overflow condition. This flaw allows an attacker to remotely exploit the device without requiring user interaction or prior authentication, as indicated by the CVSS vector (AV:N/AC:L/AT:N/UI:N/PR:L). The buffer overflow can lead to significant impacts on confidentiality, integrity, and availability, potentially enabling remote code execution or denial of service. The vendor has not responded to the disclosure, and although no public exploit is currently known to be actively used in the wild, the exploit code has been released publicly, increasing the risk of exploitation. The vulnerability's CVSS 4.0 score is 8.7, reflecting its high severity and ease of exploitation over the network. The absence of a patch or mitigation from the vendor further exacerbates the risk for users of this product. The HiPER 840G is a network device, likely used in enterprise or industrial environments, making this vulnerability particularly concerning for organizations relying on this hardware for critical network functions.

For European organizations, the exploitation of CVE-2025-10756 could result in unauthorized remote code execution, data leakage, or disruption of network services, potentially affecting operational continuity and data confidentiality. Given the device's role in network infrastructure, successful exploitation could allow attackers to pivot within internal networks, compromise sensitive information, or disrupt critical communications. This is especially impactful for sectors with stringent data protection requirements such as finance, healthcare, and government agencies within Europe. The lack of vendor response and patches means organizations must assume a heightened risk posture. Additionally, the public availability of exploit code increases the likelihood of opportunistic attacks, including by cybercriminal groups or state-sponsored actors targeting European entities. The vulnerability could also undermine compliance with EU regulations like GDPR if personal data is compromised due to exploitation.

European organizations using UTT HiPER 840G devices should immediately conduct an inventory to identify affected versions (up to 3.1.1-190328). In the absence of an official patch, organizations should implement network-level mitigations such as isolating the device from untrusted networks, restricting access to the vulnerable endpoint (/goform/getOneApConfTempEntry) via firewall rules, and employing intrusion detection/prevention systems to monitor and block suspicious traffic targeting this endpoint. Network segmentation should be enforced to limit lateral movement if exploitation occurs. Organizations should also consider deploying virtual patching through Web Application Firewalls (WAFs) or similar technologies to detect and block exploit attempts. Regular monitoring of network logs and anomaly detection systems should be enhanced to identify potential exploitation attempts. Finally, organizations should engage with UTT for updates and consider alternative hardware if no remediation is forthcoming.