CVE-2025-43424 is a security vulnerability identified in Apple’s iOS and iPadOS operating systems affecting unspecified versions prior to 26.1. The vulnerability stems from inadequate bounds checking in the handling of input from Human Interface Devices (HIDs). A malicious HID device, when connected to an iPhone or iPad, can trigger an unexpected process crash, leading to denial of service conditions. This flaw does not appear to allow code execution or privilege escalation but can disrupt normal device operations by crashing critical processes. Apple addressed the issue by improving bounds checks in iOS and iPadOS 26.1, which prevents the malformed input from causing crashes. Exploitation requires physical access to the target device to connect the malicious HID, limiting remote attack feasibility. No public exploits or active attacks have been reported to date. The vulnerability impacts the availability of affected devices, potentially causing user inconvenience or operational disruption in environments relying on these devices. The lack of a CVSS score suggests the vulnerability is recognized but not yet fully assessed for severity. Given the nature of the flaw, it is primarily a denial of service vector rather than a confidentiality or integrity compromise.

For European organizations, the primary impact of CVE-2025-43424 is operational disruption due to denial of service on Apple mobile devices. Organizations relying heavily on iPhones and iPads for critical communication, field operations, or mobile workforce productivity may experience interruptions if malicious HID devices are introduced. While the vulnerability does not expose sensitive data or allow unauthorized access, repeated crashes could degrade user experience and productivity. In sectors such as finance, healthcare, and government where mobile device availability is crucial, this could translate into reduced operational efficiency or delayed response times. Additionally, environments with lax physical security controls are more vulnerable to exploitation, as attackers need physical access to connect a malicious HID. The lack of known exploits reduces immediate risk, but the potential for targeted attacks in high-value environments remains. Overall, the impact is moderate but warrants attention in security-sensitive European organizations.

To mitigate CVE-2025-43424, European organizations should: 1) Ensure all Apple iOS and iPadOS devices are updated to version 26.1 or later, which contains the fix for this vulnerability. 2) Implement strict physical security controls to prevent unauthorized individuals from connecting external devices to corporate mobile devices, including the use of device management policies that restrict USB or HID connections. 3) Employ Mobile Device Management (MDM) solutions to enforce security configurations and monitor device integrity. 4) Educate employees about the risks of connecting unknown peripherals and encourage reporting of suspicious devices. 5) In high-risk environments, consider disabling or limiting the use of external HID devices where feasible. 6) Regularly audit device usage and physical access logs to detect potential tampering. These measures collectively reduce the risk of exploitation by limiting both the attack vector and exposure.