CVE-2025-43419 is a memory corruption vulnerability classified under CWE-119, affecting Apple iOS and iPadOS devices when processing maliciously crafted web content. The vulnerability resides in Safari and related web content processing components, where improper memory handling can be exploited by an attacker to cause memory corruption. This can lead to arbitrary code execution, allowing attackers to compromise the confidentiality, integrity, and availability of the device. The vulnerability requires no privileges to exploit but does require user interaction, such as visiting a malicious website or clicking a crafted link. The CVSS v3.1 score is 8.8, indicating high severity, with attack vector network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), and impacts on confidentiality, integrity, and availability all rated high (C:H/I:H/A:H). Apple addressed this issue by improving memory handling in Safari 26 and corresponding OS updates including iOS 26, iPadOS 26, tvOS 26, watchOS 26, and visionOS 26. No known exploits have been reported in the wild yet, but the vulnerability's characteristics make it a significant risk, especially for users who browse untrusted web content. The affected versions are unspecified but are all versions prior to the patched releases. This vulnerability highlights the risks associated with web content rendering engines and the importance of timely patching.

For European organizations, this vulnerability poses a significant risk, particularly for those with employees using Apple mobile devices for web browsing and business operations. Successful exploitation can lead to full device compromise, exposing sensitive corporate data, credentials, and communications. This can facilitate further lateral movement within corporate networks or enable espionage and data theft. The high severity and ease of exploitation mean that attackers could deploy phishing campaigns or malicious websites targeting European users. Industries with high reliance on mobile Apple devices, such as finance, healthcare, and government sectors, are particularly vulnerable. The potential for disruption and data loss could result in regulatory penalties under GDPR if personal data is compromised. Additionally, the vulnerability could be leveraged in targeted attacks against high-value individuals or organizations within Europe, amplifying its impact.

European organizations should prioritize immediate patching of all affected Apple devices to iOS 26, iPadOS 26, and Safari 26 or later versions. Deploy centralized device management solutions to enforce update policies and monitor compliance. Implement web filtering and URL reputation services to block access to known malicious websites and reduce exposure to crafted web content. Educate users on the risks of clicking unknown links or visiting untrusted websites, emphasizing the need for caution with unsolicited communications. Consider deploying endpoint protection solutions capable of detecting exploitation attempts targeting memory corruption vulnerabilities. For high-risk environments, restrict or sandbox web browsing activities on Apple devices. Regularly audit and inventory Apple devices to ensure no unpatched systems remain. Finally, maintain incident response plans that include scenarios involving mobile device compromise to enable rapid containment and remediation.