CVE-2025-43426 is a vulnerability identified in Apple’s iOS and iPadOS platforms related to a logging mechanism that failed to adequately redact sensitive user data. This flaw allowed applications to potentially access sensitive information that should have been obscured or protected within system logs. The root cause was insufficient data redaction in logging processes, which could inadvertently expose confidential user data to any app with access to these logs. Apple addressed this issue in the release of iOS 26.1 and iPadOS 26.1 by enhancing the data redaction techniques to prevent sensitive information leakage. The vulnerability affects unspecified versions prior to these updates, implying a broad range of devices could be impacted if not updated. Although no exploits have been reported in the wild, the vulnerability presents a significant risk because it could be exploited by malicious or compromised apps to harvest sensitive data without user consent or awareness. This includes personal information, credentials, or other confidential data that may be logged by the system or apps. The vulnerability does not require user interaction beyond app installation and does not require elevated privileges beyond those normally granted to apps, increasing the risk profile. The absence of a CVSS score necessitates an assessment based on the potential impact on confidentiality, ease of exploitation, and scope of affected systems. Given the widespread use of Apple devices in enterprise and personal contexts, this vulnerability poses a notable threat vector for data breaches and privacy violations.

For European organizations, this vulnerability could lead to unauthorized disclosure of sensitive user data, potentially violating data protection regulations such as GDPR. Organizations relying heavily on Apple mobile devices for communication, data access, or operational tasks may face increased risk of data leakage if devices are not promptly updated. The exposure of sensitive information could result in reputational damage, regulatory fines, and operational disruptions. Sectors such as finance, healthcare, government, and critical infrastructure, where confidentiality is paramount, are particularly vulnerable. Additionally, the ease with which an app could exploit this vulnerability without requiring elevated privileges or user interaction increases the risk of widespread exploitation. This could facilitate espionage, identity theft, or targeted attacks against European entities. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits rapidly after public disclosure.

European organizations should prioritize updating all iOS and iPadOS devices to version 26.1 or later to ensure the vulnerability is patched. Beyond patching, organizations should enforce strict app vetting and permission policies, limiting app access to logs and sensitive data where possible. Implement Mobile Device Management (MDM) solutions to monitor device compliance and restrict installation of untrusted applications. Regularly audit installed apps and their permissions to detect potentially malicious or unnecessary access to sensitive data. Educate users on the risks of installing apps from untrusted sources and encourage prompt installation of security updates. For highly sensitive environments, consider deploying additional endpoint security solutions capable of monitoring app behavior for anomalous access to logs or data. Finally, maintain incident response readiness to quickly address any suspected data leakage incidents stemming from this vulnerability.