CVE-2025-10891 is an integer overflow vulnerability identified in the V8 JavaScript engine component of Google Chrome prior to version 140.0.7339.207. The vulnerability arises when V8 improperly handles integer values during JavaScript execution, leading to an overflow condition. This overflow can corrupt the heap memory layout, enabling a remote attacker to manipulate memory in a way that may result in arbitrary code execution within the context of the browser process. The attack vector involves a crafted HTML page containing malicious JavaScript that triggers the overflow when processed by the vulnerable V8 engine. Exploitation requires user interaction, such as visiting or interacting with a malicious webpage, but does not require any prior authentication or elevated privileges. The vulnerability affects the confidentiality, integrity, and availability of the system by potentially allowing attackers to execute arbitrary code, steal sensitive information, or cause denial of service. The CVSS v3.1 base score of 8.8 reflects the high impact and ease of exploitation (network vector, low attack complexity, no privileges required, user interaction needed). Although no active exploits have been reported in the wild, the severity and nature of this vulnerability make it a critical concern for all users of affected Chrome versions. The vulnerability was publicly disclosed on September 24, 2025, and Google has released a patched version to address the issue.

The impact of CVE-2025-10891 is significant for organizations worldwide due to the widespread use of Google Chrome as a primary web browser. Successful exploitation can lead to arbitrary code execution within the browser context, potentially allowing attackers to bypass security controls, execute malicious payloads, steal sensitive data such as credentials or session tokens, and disrupt normal operations through denial of service. This can facilitate further network intrusion or lateral movement within corporate environments. The vulnerability affects confidentiality by enabling data theft, integrity by allowing code manipulation, and availability by causing crashes or service interruptions. Organizations relying heavily on web-based applications or those with employees frequently browsing the internet are particularly at risk. The requirement for user interaction (visiting a malicious webpage) means phishing or drive-by download attacks could be effective exploitation methods. Given the high CVSS score and the critical role of browsers in modern IT environments, the threat poses a substantial risk to enterprise security, user privacy, and operational continuity.

To mitigate CVE-2025-10891, organizations should immediately update all affected Google Chrome installations to version 140.0.7339.207 or later, where the vulnerability is patched. Beyond patching, organizations should enforce strict browser update policies and automate patch management to minimize exposure windows. Employing browser security features such as sandboxing, site isolation, and strict content security policies can reduce the impact of potential exploitation. Network-level protections like web filtering and blocking access to known malicious sites can prevent users from reaching exploit-hosting pages. User education on phishing and safe browsing practices is critical to reduce the risk of user interaction with malicious content. Monitoring browser crash reports and unusual network traffic patterns can help detect exploitation attempts. For high-security environments, consider deploying endpoint detection and response (EDR) solutions capable of identifying anomalous behavior related to browser exploits. Finally, maintaining an inventory of browser versions across the organization aids in rapid vulnerability assessment and remediation.