CVE-2025-24206 is an authentication bypass vulnerability identified in Apple tvOS and several other Apple operating systems, including macOS Sequoia 15.4, tvOS 18.4, macOS Ventura 13.7.5, iPadOS 17.7.6, macOS Sonoma 14.7.5, iOS 18.4, iPadOS 18.4, and visionOS 2.4. The root cause of the vulnerability is improper state management within the authentication mechanism, which allows an attacker positioned on the same local network to circumvent authentication policies without requiring any privileges or user interaction. This flaw is categorized under CWE-288 (Authentication Bypass Using an Alternate Path or Channel). The vulnerability affects unspecified versions prior to the patched releases. The CVSS v3.1 base score is 7.7 (High), with vector AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N, indicating that the attack requires local network access, low attack complexity, no privileges, and no user interaction, with high impact on confidentiality and integrity but no impact on availability. Although no known exploits have been reported in the wild, the vulnerability poses a significant risk due to the potential for unauthorized access to sensitive information and system integrity compromise. Apple has released patches in the latest versions of their operating systems to address this issue by improving state management in the authentication process.

The vulnerability allows an attacker on the same local network to bypass authentication controls, potentially gaining unauthorized access to Apple devices running affected operating systems. This can lead to exposure of sensitive user data, unauthorized control over device functions, and compromise of system integrity. Since the attack requires only local network access and no privileges or user interaction, it is feasible in environments where attackers can connect to the same network, such as public Wi-Fi, corporate LANs, or compromised routers. The impact is particularly severe in enterprise or institutional settings where Apple devices are used to access confidential information or control critical systems. The lack of availability impact means the device remains operational, potentially allowing persistent unauthorized access. The vulnerability could facilitate lateral movement within networks, data exfiltration, and further exploitation of connected systems. Organizations relying heavily on Apple ecosystems for media, communication, or operational technology are at increased risk.

Organizations and users should immediately apply the security updates released by Apple for all affected platforms, including tvOS 18.4, macOS Sequoia 15.4, macOS Ventura 13.7.5, macOS Sonoma 14.7.5, iPadOS 17.7.6 and 18.4, iOS 18.4, and visionOS 2.4. Network segmentation should be enforced to limit local network access only to trusted devices and users, reducing the attack surface. Employ strong network access controls such as WPA3 for Wi-Fi, and monitor for unauthorized devices on local networks. Implement network intrusion detection systems (NIDS) to detect anomalous authentication bypass attempts. Disable unnecessary local network services on Apple devices where possible. Educate users about the risks of connecting to untrusted local networks and encourage use of VPNs when on public or insecure networks. Regularly audit device configurations and authentication policies to ensure they adhere to best security practices. For organizations, consider deploying endpoint detection and response (EDR) solutions capable of identifying suspicious local network activity related to authentication anomalies.