CVE-2025-2783 is a vulnerability identified in Google Chrome versions prior to 134.0.6998.177 on Windows platforms. The issue arises from an incorrect handle being provided under unspecified circumstances within Mojo, Chromium's IPC framework responsible for secure communication between browser processes. This flaw can be exploited remotely by an attacker who crafts a malicious file that, when processed by the vulnerable Chrome instance, triggers a sandbox escape. Sandbox escapes are critical because they allow code running in a restricted environment (the browser sandbox) to break out and execute with higher privileges on the host system, potentially leading to full system compromise. The vulnerability has a CVSS v3.1 base score of 8.3, reflecting high impact on confidentiality, integrity, and availability. The attack vector is network-based (AV:N), requires high attack complexity (AC:H), no privileges (PR:N), but does require user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects components beyond the initially vulnerable scope. The vulnerability is classified as high severity by Chromium security. No public exploits have been reported yet, but the potential for exploitation exists given the nature of sandbox escapes. The vulnerability is specific to Windows versions of Chrome, which is significant given Chrome's dominant market share on Windows desktops. The lack of detailed technical disclosure limits precise exploit analysis, but the involvement of Mojo IPC and handle mismanagement suggests a logic or resource management flaw that can be leveraged to bypass sandbox restrictions.

For European organizations, the impact of CVE-2025-2783 is significant due to the widespread use of Google Chrome on Windows endpoints. Successful exploitation can lead to sandbox escape, allowing attackers to execute arbitrary code with elevated privileges on the affected system. This can result in data theft, installation of persistent malware, lateral movement within corporate networks, and disruption of critical services. Organizations handling sensitive personal data, intellectual property, or critical infrastructure are particularly at risk. The vulnerability's requirement for user interaction means phishing or malicious file delivery campaigns could be effective attack vectors. Given the high confidentiality, integrity, and availability impact, exploitation could lead to regulatory consequences under GDPR if personal data is compromised. Additionally, the potential for widespread exploitation could disrupt business continuity and damage organizational reputation across Europe.

European organizations should immediately update all Windows-based Google Chrome installations to version 134.0.6998.177 or later, where the vulnerability is patched. Beyond patching, organizations should implement strict email and web filtering to block malicious files and links that could trigger exploitation. Endpoint detection and response (EDR) solutions should be tuned to detect anomalous process behavior indicative of sandbox escapes. User awareness training should emphasize the risks of opening untrusted files or links. Network segmentation can limit lateral movement if an endpoint is compromised. Additionally, organizations should monitor threat intelligence feeds for any emerging exploits related to this CVE. For high-security environments, consider restricting Chrome usage or employing application control policies to limit execution of untrusted code. Regular vulnerability scanning and asset inventory will help ensure no vulnerable versions remain in use.