CVE-2025-10200 is a critical use-after-free vulnerability identified in the ServiceWorker component of Google Chrome on desktop platforms, affecting versions prior to 140.0.7339.127. A use-after-free vulnerability occurs when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption, crashes, or arbitrary code execution. In this case, the vulnerability allows a remote attacker to exploit heap corruption by crafting a malicious HTML page that triggers the use-after-free condition within the ServiceWorker implementation. ServiceWorkers are scripts that run in the background of web browsers, enabling features like offline support, background sync, and push notifications. Because ServiceWorkers operate with elevated privileges and have access to network requests and caching, exploitation of this vulnerability could allow an attacker to execute arbitrary code in the context of the browser process, potentially leading to full compromise of the user's browser environment. The vulnerability is present in Chrome versions prior to 140.0.7339.127, and no known exploits are currently reported in the wild. However, given the critical nature of use-after-free vulnerabilities and the widespread use of Chrome, this issue represents a significant security risk. The absence of a CVSS score suggests the vulnerability is newly disclosed and pending further analysis, but the Chromium security team has classified it as critical, indicating high severity. The vulnerability was published on September 10, 2025, and affects desktop versions of Chrome, which are widely used across various operating systems including Windows, macOS, and Linux.

For European organizations, the impact of this vulnerability could be substantial due to the widespread adoption of Google Chrome as a primary web browser in corporate and governmental environments. Exploitation could lead to unauthorized code execution, enabling attackers to bypass security controls, steal sensitive information, or deploy malware within the network. Given that ServiceWorkers have access to network requests and caching, attackers could manipulate web traffic or inject malicious content, potentially compromising web applications and user data. The vulnerability could be leveraged in targeted phishing campaigns or drive-by download attacks, increasing the risk of data breaches and operational disruption. Organizations handling sensitive personal data under GDPR regulations face additional compliance risks if this vulnerability is exploited to exfiltrate data. Furthermore, the critical nature of the vulnerability means that attackers could achieve remote code execution without requiring user authentication, increasing the attack surface. The lack of known exploits in the wild currently provides a window for organizations to patch and mitigate the risk before active exploitation begins.

European organizations should prioritize updating Google Chrome to version 140.0.7339.127 or later immediately to remediate this vulnerability. Given the critical nature of the issue, automated patch management systems should be leveraged to ensure rapid deployment across all endpoints. Additionally, organizations should implement network-level protections such as web filtering and intrusion detection systems to monitor and block suspicious HTML content or exploit attempts targeting ServiceWorkers. Security teams should review browser usage policies to limit or control the execution of untrusted ServiceWorkers, potentially disabling ServiceWorkers in high-risk environments if feasible. Endpoint detection and response (EDR) solutions should be tuned to detect anomalous browser behavior indicative of exploitation attempts. User awareness training should emphasize caution with unsolicited links or websites, as exploitation requires visiting a crafted HTML page. Finally, organizations should monitor threat intelligence feeds for any emerging exploit activity related to this vulnerability to respond promptly.