CVE-2025-14322 is a security vulnerability identified in Mozilla Firefox's Graphics: CanvasWebGL component, specifically due to incorrect boundary conditions in the handling of WebGL canvas operations. This flaw allows a sandbox escape, meaning that an attacker can bypass the browser's security sandbox designed to isolate web content from the underlying operating system. The affected versions include Firefox releases prior to version 146 and Extended Support Release (ESR) versions prior to 115.31 and 140.6. The vulnerability stems from improper validation or boundary checking in the CanvasWebGL implementation, which can be exploited by a crafted web page or malicious content to execute arbitrary code outside the sandbox. This could lead to full system compromise under the privileges of the user running the browser. Although no known exploits have been reported in the wild, the nature of the vulnerability suggests that exploitation could be straightforward for attackers with web delivery capabilities. The absence of a CVSS score indicates that the vulnerability is newly published and pending detailed scoring. The vulnerability affects a widely used browser component responsible for rendering complex graphics, making it a critical attack vector. The sandbox escape elevates the risk from a typical browser vulnerability to a severe threat capable of breaching endpoint defenses.

For European organizations, this vulnerability presents a significant risk to endpoint security, particularly for those relying heavily on Firefox for web access. Successful exploitation could lead to arbitrary code execution, data theft, installation of persistent malware, or lateral movement within corporate networks. Confidential information handled through the browser could be exposed, and system integrity compromised, potentially disrupting business operations. The vulnerability could be leveraged in targeted attacks against critical infrastructure, government agencies, financial institutions, and enterprises with high-value data. Organizations with remote or hybrid workforces using Firefox on unmanaged devices face increased exposure. The lack of known exploits currently provides a window for proactive mitigation, but the widespread use of Firefox in Europe elevates the potential impact. Additionally, the sandbox escape nature of the flaw increases the severity compared to typical browser vulnerabilities, as it can bypass one of the primary security mechanisms designed to contain browser-based attacks.

European organizations should immediately inventory Firefox installations to identify affected versions and prioritize upgrades to Firefox 146 or ESR versions 115.31 and 140.6 or later once patches are released. Until patches are available, consider disabling WebGL functionality via browser settings or enterprise policies to reduce attack surface. Employ browser hardening techniques such as restricting JavaScript execution from untrusted sites and using content security policies. Deploy endpoint detection and response (EDR) solutions to monitor for anomalous behavior indicative of sandbox escapes or code execution outside the browser. Educate users about the risks of visiting untrusted websites and opening suspicious links. Network segmentation and application whitelisting can limit the impact of a successful exploit. Maintain up-to-date backups and incident response plans to quickly recover from potential compromises. Collaborate with Mozilla security advisories and apply updates promptly to minimize exposure.