CVE-2025-34123 is a high-severity stack-based buffer overflow vulnerability identified in VideoCharge Software's Studio product, version 2.12.3.685. The flaw arises from improper handling of user-supplied data within the XML 'Name' attribute of .VSC configuration files. Specifically, when the software processes a maliciously crafted .VSC file, it fails to properly validate or sanitize the input length or content, leading to a stack buffer overflow. This overflow enables an attacker to overwrite the Structured Exception Handler (SEH) on the stack, a technique often leveraged to gain control over program execution flow. Exploiting this vulnerability requires the attacker to convince a user to open a malicious .VSC file, which triggers the overflow and allows arbitrary code execution under the context of the user. The vulnerability does not require prior authentication but does require user interaction (opening the file). The CVSS 4.0 base score is 8.4, reflecting high severity, with attack vector local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), and user interaction required (UI:A). The impact on confidentiality, integrity, and availability is high, as arbitrary code execution can lead to full system compromise or data theft. No known exploits are currently reported in the wild, and no patches have been published yet. The vulnerability is categorized under CWE-121 (stack-based buffer overflow), CWE-20 (improper input validation), and CWE-94 (improper control of code generation), indicating a combination of input validation and memory corruption issues.

For European organizations using VideoCharge Studio 2.12.3.685, this vulnerability poses a significant risk. Successful exploitation can lead to arbitrary code execution, potentially allowing attackers to install malware, exfiltrate sensitive data, or disrupt operations. Since the attack vector requires local access and user interaction, phishing or social engineering campaigns distributing malicious .VSC files could be effective. Organizations in media production, digital content management, or any sector relying on VideoCharge Studio for video processing are particularly at risk. The compromise of user systems could serve as a foothold for lateral movement within corporate networks, threatening broader enterprise security. Additionally, the high impact on confidentiality and integrity could lead to data breaches, regulatory non-compliance (e.g., GDPR), and reputational damage. The absence of patches increases the urgency for mitigation, especially in environments where the software is widely used or where users have elevated privileges.

Given the lack of an official patch, European organizations should implement immediate compensating controls. These include: 1) Restricting the use of VideoCharge Studio to trusted users and limiting the acceptance of .VSC files from unverified sources. 2) Implementing strict email filtering and endpoint security controls to detect and block malicious .VSC files or suspicious attachments. 3) Educating users about the risks of opening unsolicited or unexpected configuration files, emphasizing caution with .VSC files. 4) Employing application whitelisting and sandboxing techniques to isolate VideoCharge Studio processes, limiting the impact of potential exploitation. 5) Monitoring system and network logs for unusual behavior indicative of exploitation attempts, such as unexpected process spawning or memory access violations. 6) Planning for rapid deployment of patches once released by the vendor and maintaining an inventory of affected software versions to prioritize remediation. 7) Considering temporary removal or replacement of VideoCharge Studio in critical environments until the vulnerability is addressed.