CVE-2026-64763 in iOS
Summary
by MITRE • 07/28/2026
An out-of-bounds write issue was addressed by removing the vulnerable code. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a critical out-of-bounds write flaw that could potentially enable remote code execution through carefully crafted malicious files. The issue was specifically addressed by removing the vulnerable code paths, indicating that the flaw originated from improper input validation or memory management within Apple's operating system components. The fix was implemented across multiple platform versions including iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, and watchOS 26.6, demonstrating the widespread nature of the vulnerability across Apple's ecosystem.
The technical nature of this flaw aligns with common software security vulnerabilities classified under CWE-787 - Out-of-Bounds Write, which occurs when a program writes data past the end of a buffer or array. This type of vulnerability typically arises from insufficient bounds checking in memory operations and can be exploited by attackers who craft malicious input files designed to trigger the overflow condition. When processing these crafted files, affected systems may experience unexpected application termination or more critically, arbitrary code execution, where attacker-controlled code can be executed with the privileges of the vulnerable application.
The operational impact of this vulnerability extends beyond simple application crashes to potentially enable full system compromise, particularly when considering the ATT&CK framework's T1059.007 - Command and Scripting Interpreter: PowerShell and similar techniques that could leverage such memory corruption vulnerabilities for privilege escalation. Attackers could exploit this weakness to execute malicious payloads on targeted systems without requiring user interaction beyond opening or processing the malicious file, making it particularly dangerous in environments where users might encounter untrusted content.
The remediation approach taken by Apple demonstrates a proactive security stance through complete code removal rather than attempting to patch the vulnerability with workarounds. This suggests the flaw was significant enough that partial fixes would not adequately address the underlying security risk. Organizations should prioritize immediate deployment of the updated system versions across all affected platforms, particularly in enterprise environments where the attack surface is larger and the potential for exploitation greater. The vulnerability's presence across multiple Apple operating systems indicates a systemic issue that likely stems from shared codebases or common libraries used throughout the company's product suite, emphasizing the need for comprehensive security assessments of interconnected components.