CVE-2025-43436: Apple iPadOS Information Disclosure Flaw

CVE-2025-43436 Overview

CVE-2025-43436 is an authentication bypass vulnerability affecting multiple Apple operating systems that allows malicious applications to enumerate installed apps on a user's device. The vulnerability stems from a permissions issue that was inadequately enforced, enabling apps to bypass normal access restrictions and discover what other applications are installed on the target device.

This type of installed app enumeration vulnerability presents significant privacy concerns as it allows attackers to fingerprint devices, profile users based on their installed applications, and potentially identify targets for further exploitation based on the presence of vulnerable or sensitive applications.

Critical Impact

Malicious apps can enumerate all installed applications on affected Apple devices, enabling user profiling, device fingerprinting, and identification of potentially vulnerable apps for targeted attacks.

Affected Products

• Apple iOS (versions prior to 26.1)
• Apple iPadOS (versions prior to 26.1)
• Apple tvOS (versions prior to 26.1)
• Apple visionOS (versions prior to 26.1)
• Apple watchOS (versions prior to 26.1)

Discovery Timeline

• 2025-11-04 - CVE-2025-43436 published to NVD
• 2026-04-02 - Last updated in NVD database

Technical Details for CVE-2025-43436

Vulnerability Analysis

This vulnerability is classified under CWE-288 (Authentication Bypass Using an Alternate Path or Channel), indicating that the permissions mechanism in affected Apple operating systems contained a flaw allowing applications to circumvent the intended access controls. The vulnerability enables unauthorized information disclosure by allowing apps to query and enumerate installed applications on the device without proper permission checks.

The attack can be conducted remotely through a malicious application distributed via various channels. Once installed, the malicious app can silently enumerate all installed applications without requiring any user interaction or elevated privileges. This information disclosure capability is particularly concerning in enterprise environments where the presence of specific security, MDM, or sensitive business applications could be revealed to attackers.

Root Cause

The root cause of CVE-2025-43436 is an improper permissions implementation within Apple's operating system sandboxing mechanism. The existing access control mechanisms failed to properly restrict applications from querying the system for information about other installed applications. This authentication bypass allowed apps to access data that should have been protected by the operating system's privacy controls.

Apple addressed this vulnerability by implementing additional restrictions to the permissions framework, ensuring that applications cannot enumerate installed apps without explicit authorization.

Attack Vector

The attack vector for this vulnerability is network-based, as the exploit can be delivered through a malicious application distributed via the internet, phishing campaigns, or even potentially through the App Store if malicious code evades review processes.

The exploitation scenario involves:

1. Attacker creates a malicious application that leverages the permissions bypass
2. The malicious app is distributed to target devices through various channels
3. Once installed and executed, the app silently enumerates all installed applications
4. Collected app inventory data is exfiltrated to attacker-controlled infrastructure
5. Attacker uses the enumerated app data for profiling, targeting, or further attack planning

The vulnerability requires no user interaction beyond installing the malicious application and does not require elevated privileges to exploit. The attack directly impacts confidentiality by exposing sensitive information about the user's installed applications.

Detection Methods for CVE-2025-43436

Indicators of Compromise

• Unusual application queries to system APIs responsible for retrieving installed app information
• Network traffic from applications transmitting lists of installed applications to external servers
• Applications requesting or accessing app enumeration capabilities without legitimate business justification
• Suspicious apps installed outside official App Store channels that exhibit profiling behavior

Detection Strategies

• Monitor for applications making repeated system calls to enumerate installed applications
• Implement mobile device management (MDM) solutions to detect unauthorized app installations
• Use endpoint detection and response (EDR) tools to identify abnormal application behavior patterns
• Review application permissions and flag apps with unexplained access to system information

Monitoring Recommendations

• Enable enhanced logging on Apple devices where supported to capture system API access patterns
• Configure network monitoring to detect exfiltration of device inventory data
• Implement app allow-listing policies in enterprise environments to restrict unauthorized app installations
• Regularly audit installed applications on managed devices for suspicious or unknown software

How to Mitigate CVE-2025-43436

Immediate Actions Required

• Update all affected Apple devices to iOS 26.1, iPadOS 26.1, tvOS 26.1, visionOS 26.1, or watchOS 26.1 immediately
• Audit currently installed applications and remove any suspicious or unauthorized apps
• Enable automatic updates on all Apple devices to ensure timely patching
• Review and restrict app installation permissions in enterprise MDM configurations
• Educate users about the risks of installing applications from untrusted sources

Patch Information

Apple has released security patches addressing CVE-2025-43436 in the following software versions:

• iOS 26.1 - Apple Support Article #125632
• iPadOS 26.1 - Apple Support Article #125632
• macOS Tahoe 26.1 - Apple Support Article #125634
• tvOS 26.1 - Apple Support Article #125637
• visionOS 26.1 - Apple Support Article #125638
• watchOS 26.1 - Apple Support Article #125639

Organizations should prioritize deployment of these updates across all managed Apple devices to eliminate the vulnerability.

Workarounds

• Restrict app installations to only trusted sources and approved applications in enterprise environments
• Implement network segmentation to limit potential data exfiltration paths from compromised devices
• Use MDM policies to enforce app restrictions and prevent installation of potentially malicious applications
• Consider implementing app vetting processes for any applications deployed in sensitive environments

# Example MDM configuration to restrict app installations (conceptual)
# Restrict app installations to managed apps only
# Enable Supervised mode on enterprise devices
# Configure App Store restrictions via MDM profile
# Monitor device compliance through MDM dashboard