Apple iOS EUVD-2026-29218

Remote network access to target device is the primary requirement. No authentication needed (PR:N) and low attack complexity (AC:L) means default configurations of affected Apple platforms are vulnerable. No user interaction required (UI:N) beyond normal application usage that triggers vulnerable code path, such as browsing to a website, receiving network data, or processing remote content. Exploitation depends on triggering the specific vulnerable component through network-supplied data that exceeds buffer bounds. Not all applications on affected systems may trigger the vulnerable code path; exploitation requires the target application to utilize the affected framework component for network data processing. Devices running unpatched versions (iOS/iPadOS <18.7.9 or <26.5, macOS <14.8.7/<15.7.7/<26.5, tvOS/visionOS/watchOS <26.5) are vulnerable. The cross-platform nature suggests the vulnerable component is a shared framework rather than OS-specific code.

Medium-priority vulnerability requiring scheduled patching rather than emergency response. CVSS 7.5 (High severity) is driven by network attack vector (AV:N), low complexity (AC:L), no authentication required (PR:N), and high availability impact (A:H), but scope is unchanged (S:U) and there is no confidentiality or integrity impact (C:N/I:N). However, real-world risk is significantly lower than CVSS suggests: EPSS 0.12% (30th percentile) indicates security researchers assess exploitation probability as below average, and no public exploit identified at time of analysis. Attack is limited to application termination rather than code execution, reducing attractiveness to attackers. The vulnerability requires remote network access but can only crash specific applications, not compromise the system or exfiltrate data. For enterprise environments, impact is primarily user productivity loss from app crashes rather than security breach. Patch priority should be standard maintenance cycle unless apps critical to business operations are affected. Defense-in-depth measures like network segmentation provide minimal additional protection since the attack vector is application-layer protocol handling.

Attacker crafts malicious network packets or HTTP responses containing oversized data that exceeds allocated buffer boundaries in a vulnerable Apple framework component. When a user's device processes this data through an affected application (web browser, media player, or network-connected app), the stack-based buffer overflow triggers, causing the application to terminate unexpectedly. Attack requires no user interaction beyond normal application usage. Attacker could weaponize this through malicious websites, compromised legitimate sites serving poisoned content, or man-in-the-middle attacks on unencrypted connections. Impact limited to denial of service against specific applications rather than arbitrary code execution or data compromise.