CVE-2025-31221 is an integer overflow vulnerability identified in Apple’s iOS, iPadOS, and several related operating systems, including macOS variants, tvOS, visionOS, and watchOS. The root cause is improper input validation that allows an attacker to trigger an integer overflow condition. This flaw can be exploited remotely without any authentication or user interaction, enabling an attacker to leak memory contents from the affected device. Memory leakage can expose sensitive information such as cryptographic keys, user data, or system internals, potentially facilitating further attacks. Apple has released patches in iOS 18.5, iPadOS 18.5 and 17.7.7, macOS Sequoia 15.5, Sonoma 14.7.6, Ventura 13.7.6, tvOS 18.5, visionOS 2.5, and watchOS 11.5 to address this issue by improving input validation and preventing the integer overflow. The vulnerability is tracked under CWE-190 (Integer Overflow or Wraparound). The CVSS v3.1 base score is 7.5, reflecting high severity due to the remote, unauthenticated exploit vector and the high confidentiality impact. No known exploits have been reported in the wild as of the publication date. The vulnerability affects a broad range of Apple’s ecosystem, making it relevant for users and organizations relying on Apple hardware and software platforms.

This vulnerability poses a significant risk to the confidentiality of data on affected Apple devices. Remote attackers can exploit the integer overflow to leak memory contents, potentially exposing sensitive information such as passwords, encryption keys, personal data, or proprietary system information. Although the vulnerability does not directly impact system integrity or availability, the leaked information could be leveraged for further attacks, including privilege escalation or targeted espionage. Organizations with large deployments of Apple devices, especially in sectors like finance, healthcare, government, and technology, face increased risk of data breaches and intellectual property theft. The lack of required authentication or user interaction lowers the barrier for exploitation, increasing the threat landscape. The broad range of affected operating systems means that many device types—mobile phones, tablets, desktops, smartwatches, and smart TVs—are vulnerable, expanding the potential attack surface.

Organizations and users should immediately apply the security updates released by Apple for iOS 18.5, iPadOS 18.5 and 17.7.7, macOS Sequoia 15.5, Sonoma 14.7.6, Ventura 13.7.6, tvOS 18.5, visionOS 2.5, and watchOS 11.5. Beyond patching, network-level protections such as firewall rules and intrusion detection systems should be configured to monitor and block suspicious traffic targeting Apple devices, especially from untrusted external sources. Enterprises should enforce strict device management policies to ensure timely deployment of updates and restrict installation of untrusted applications that could exploit memory leaks. Security teams should conduct memory forensics and monitor for unusual data exfiltration patterns that might indicate exploitation attempts. Additionally, organizations should educate users about the importance of keeping devices updated and avoiding risky network environments. For high-security environments, consider network segmentation to isolate vulnerable Apple devices until patches are applied.