CVE-2025-66555 in AirKeyboard App
Summary
by MITRE • 12/04/2025
AirKeyboard iOS App 1.0.5 contains a missing authentication vulnerability that allows unauthenticated attackers to type arbitrary keystrokes directly into the victim's iOS device in real-time without user interaction, resulting in full remote input control.
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Analysis
by VulDB Data Team • 12/05/2025
The vulnerability identified as CVE-2025-66555 represents a critical security flaw in the AirKeyboard iOS application version 1.0.5 that fundamentally compromises user device integrity and privacy. This issue stems from a complete absence of authentication mechanisms within the application's input handling system, creating an exploitable pathway that enables remote attackers to inject keystrokes directly into iOS devices without any user consent or interaction. The flaw exists at the application layer where legitimate input processing should require explicit user authorization or device authentication before accepting external input commands.
The technical implementation of this vulnerability demonstrates a severe architectural oversight where the application fails to validate the source of input commands, allowing any remote entity to establish a connection and transmit keystroke data directly to the target device. This missing authentication control creates a persistent backdoor that operates at the system level, bypassing iOS security controls and potentially enabling attackers to execute arbitrary commands through keyboard input. The real-time nature of the attack means that victims cannot detect the unauthorized input activity until after it has occurred, making this a particularly insidious vulnerability that operates silently in the background.
From an operational impact perspective, this vulnerability provides attackers with complete remote control over affected devices, enabling them to perform actions such as entering passwords, executing commands through terminal applications, accessing sensitive data, and potentially escalating privileges through authenticated sessions. The vulnerability directly maps to CWE-305 Authentication Issues, specifically addressing the absence of proper authentication mechanisms that should prevent unauthorized access to system functions. This flaw essentially transforms any user's iOS device into a remote-controlled input terminal, potentially allowing attackers to bypass traditional security controls such as passcode locks, biometric authentication, and application-specific access controls.
The attack surface for this vulnerability extends beyond simple keystroke injection to include potential privilege escalation and data exfiltration scenarios. An attacker could leverage this capability to access encrypted data, perform financial transactions, access corporate networks, or manipulate device settings through legitimate application interfaces. This vulnerability aligns with ATT&CK technique T1056.001 Input Capture, where adversaries establish persistent input capture capabilities that can be used to harvest credentials and sensitive information. The real-time injection capability also enables attackers to perform rapid, targeted attacks that can be difficult to trace or attribute to specific malicious actors.
Organizations and individual users should immediately disable or uninstall the affected AirKeyboard application until a patched version is available. System administrators should monitor network traffic for suspicious connections to the vulnerable application ports and consider implementing network-level restrictions to prevent unauthorized access to the application's input interfaces. Security teams should conduct comprehensive vulnerability assessments to identify any other applications or services that may be suffering from similar authentication deficiencies. The remediation process should include immediate application updates, network segmentation to limit access to the affected service, and user education regarding the risks of installing untrusted applications. Additionally, mobile device management solutions should be configured to prevent installation of applications with known security vulnerabilities, and incident response procedures should be updated to address potential exploitation of this type of input injection vulnerability.