CVE-2025-12048 is an arbitrary file upload vulnerability identified in Lenovo Scanner Pro, a client software product used for document scanning and management. The vulnerability is classified under CWE-434, which involves the unrestricted upload of files with dangerous types. This flaw arises because the application does not properly validate or restrict the types of files that can be uploaded, allowing an attacker to upload malicious files such as executable scripts or binaries. The CVSS 4.0 vector indicates the attack can be performed remotely (AV:A - adjacent network), with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The vulnerability impacts confidentiality, integrity, and availability at a high level (VC:H, VI:H, VA:H), meaning an attacker could execute arbitrary code, gain unauthorized control, and disrupt system operations. The vulnerability was discovered during an internal security assessment and published on November 12, 2025. No patches have been released yet, and no exploits are known in the wild, but the potential for remote code execution makes this a critical concern. The affected version is listed as '0', which likely indicates the initial or a broad version set of the product. The lack of authentication and user interaction requirements increases the risk of exploitation, especially in environments where Lenovo Scanner Pro is network-accessible.

For European organizations, this vulnerability poses a significant risk, particularly for those relying on Lenovo Scanner Pro in environments with network exposure or remote access capabilities. Successful exploitation could lead to remote code execution, allowing attackers to execute arbitrary commands, install malware, or move laterally within the network. This could compromise sensitive data, disrupt business operations, and potentially lead to data breaches or ransomware attacks. Critical sectors such as government, finance, healthcare, and manufacturing could face severe operational and reputational damage. The high confidentiality, integrity, and availability impact ratings suggest that exploitation could result in full system compromise. Additionally, the lack of required authentication and user interaction means attackers could exploit this vulnerability without insider access or user involvement, increasing the likelihood of automated or wormable attacks. The absence of known exploits currently provides a window for mitigation, but also means organizations must act proactively to prevent future attacks.

Organizations should immediately inventory their deployments of Lenovo Scanner Pro to identify affected versions. Until a patch is released, restrict network access to the Scanner Pro client, especially from untrusted or external networks, using firewalls and network segmentation. Implement strict file upload validation controls at the network or application layer, such as blocking executable file types and scanning uploads with advanced malware detection tools. Monitor logs and network traffic for unusual file upload activity or unexpected process executions related to Scanner Pro. Employ endpoint detection and response (EDR) solutions to detect and contain potential exploitation attempts. Once Lenovo releases a security patch, prioritize its deployment across all affected systems. Additionally, educate IT and security teams about this vulnerability to ensure rapid response to any suspicious activity. Consider disabling or limiting the use of the Scanner Pro client in high-risk environments until the vulnerability is remediated.