CVE-2025-43510 is a memory corruption vulnerability identified in Apple’s macOS and other Apple operating systems including iOS, iPadOS, watchOS, tvOS, and visionOS. The root cause is an issue with lock state checking in the handling of memory shared between processes. A malicious application exploiting this vulnerability can cause unexpected changes in shared memory, potentially leading to unauthorized data manipulation or leakage across processes. This type of vulnerability can undermine process isolation, a fundamental security principle, thereby compromising confidentiality and integrity of data. The vulnerability was addressed by Apple through improved lock state checking in the affected OS versions, with patches released in macOS Sonoma 14.8.2, macOS Sequoia 15.7.2, iOS 26.1, iPadOS 26.1, watchOS 26.1, and others. No CVSS score has been assigned yet, and there are no known exploits in the wild as of the publication date. However, the nature of the flaw suggests that a malicious app installed on a device could exploit this vulnerability without requiring user interaction beyond installation, making it a serious threat. The vulnerability affects a broad range of Apple devices, which are widely used in both consumer and enterprise environments.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of sensitive data processed on Apple devices. Since the flaw allows a malicious application to alter shared memory between processes, attackers could potentially escalate privileges, bypass security controls, or exfiltrate data from otherwise isolated processes. This could impact corporate data, intellectual property, and personal information, especially in sectors like finance, healthcare, and government where Apple devices are prevalent. The availability impact is likely lower but cannot be ruled out if memory corruption leads to system instability or crashes. The widespread use of Apple devices in Europe, including in executive environments and mobile workforces, increases the attack surface. Organizations relying on Apple ecosystems for critical operations must consider this vulnerability a high risk until patched. The absence of known exploits in the wild provides a window for proactive mitigation, but the potential for rapid exploitation once public details are available is high.

European organizations should prioritize immediate deployment of the patches released by Apple for all affected operating systems, including macOS Sonoma 14.8.2, macOS Sequoia 15.7.2, iOS 26.1, iPadOS 26.1, watchOS 26.1, and others. Beyond patching, organizations should enforce strict application control policies to prevent installation of untrusted or unsigned applications, reducing the risk of malicious apps exploiting this vulnerability. Employing Mobile Device Management (MDM) solutions to monitor and restrict app installations can be effective. Regularly auditing device compliance and ensuring users do not have unnecessary administrative privileges will limit exploitation potential. Network segmentation and endpoint detection tools should be configured to detect anomalous inter-process communication or memory manipulation behaviors. Additionally, educating users about the risks of installing unverified applications and maintaining up-to-date backups will help mitigate impact in case of exploitation.