CVE-2025-43323: Apple iPadOS Information Disclosure Flaw

CVE-2025-43323 Overview

CVE-2025-43323 is an information disclosure vulnerability affecting multiple Apple operating systems. The flaw stems from insufficient entitlement validation, allowing an installed app to fingerprint the user. Apple addressed the issue by adding additional entitlement checks across its OS lineup. The vulnerability is classified under [CWE-200] (Exposure of Sensitive Information to an Unauthorized Actor) and impacts iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. Fixed releases ship in iOS 26, iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, and watchOS 26.

Critical Impact

An installed application can bypass entitlement boundaries to collect identifying signals about the user, enabling persistent device or user fingerprinting across app launches and sessions.

Affected Products

• Apple iOS and iPadOS (versions prior to 26)
• Apple macOS Tahoe (versions prior to 26), tvOS (prior to 26), visionOS (prior to 26)
• Apple watchOS (versions prior to 26)

Discovery Timeline

• 2025-11-04 - CVE-2025-43323 published to NVD
• 2026-04-02 - Last updated in NVD database

Technical Details for CVE-2025-43323

Vulnerability Analysis

The vulnerability resides in Apple's entitlement enforcement layer. Entitlements are signed key-value pairs that grant apps access to protected resources, system services, and identifiers. When entitlement checks are missing or incomplete, an app can reach data paths it should not be authorized to query.

In this case, an app could obtain information sufficient to fingerprint the user. Fingerprinting typically combines stable device attributes, configuration values, or account-linked identifiers into a unique signature. That signature enables tracking across apps and resets that would normally provide privacy boundaries.

Apple's advisory states the issue was addressed by adding additional entitlement checks. The fix is shipped uniformly across iOS 26, iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, and watchOS 26.

Root Cause

The root cause is improper authorization on an interface that exposes user-identifying data. Without the enforced entitlement gate, the system returned data to callers that lacked the required privilege grant. This represents a confidentiality control failure rather than a memory safety defect.

Attack Vector

Exploitation requires a malicious or privacy-abusive app installed on the device, plus user interaction consistent with normal app usage. The app does not need elevated privileges. Once running, it queries the affected interface and harvests fingerprinting material that can be exfiltrated over the network to an attacker-controlled server.

No verified public proof-of-concept code is available. The vulnerability is described in prose only; see the Apple Support advisories for vendor technical detail.

Detection Methods for CVE-2025-43323

Indicators of Compromise

• Applications repeatedly querying device configuration, account, or hardware identifier APIs outside expected feature workflows.
• Outbound traffic from third-party apps to advertising, analytics, or unknown endpoints containing concatenated identifier payloads.
• Apps requesting entitlements or API surfaces inconsistent with their stated functionality in the App Store listing.

Detection Strategies

• Inventory deployed Apple devices and flag any running OS versions below the 26 release line.
• Review Mobile Device Management (MDM) telemetry for installed app entitlement requests and privacy report data on iOS and iPadOS.
• Use the on-device App Privacy Report to identify apps with unusual data access patterns or third-party domain contacts.

Monitoring Recommendations

• Aggregate MDM compliance posture into your SIEM and alert on devices that remain unpatched after a defined remediation window.
• Monitor network egress from managed mobile devices for known fingerprinting and tracker domains.
• Track app-by-app sensor and identifier access trends to surface outliers across the fleet.

How to Mitigate CVE-2025-43323

Immediate Actions Required

• Update all Apple devices to iOS 26, iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, and watchOS 26 or later.
• Enforce minimum OS version policies through MDM to block non-compliant devices from accessing corporate resources.
• Audit installed third-party applications and remove apps with excessive identifier or entitlement requests.

Patch Information

Apple released fixes in iOS 26, iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, and watchOS 26. Refer to the vendor advisories: Apple Support Document #125108, Apple Support Document #125110, Apple Support Document #125114, Apple Support Document #125115, and Apple Support Document #125116.

Workarounds

• No vendor-supplied workaround exists; patching is the supported remediation.
• Restrict app installation to vetted sources and enforce App Store review policies through MDM.
• Enable Lockdown Mode on high-risk user devices to reduce attack surface available to untrusted apps.

# Example MDM compliance check for minimum OS version
# Block enrollment or corporate access if OS build is below the fixed release
required_ios_version="26.0"
current=$(sw_vers -productVersion 2>/dev/null || echo "unknown")
if [ "$(printf '%s\n' "$required_ios_version" "$current" | sort -V | head -n1)" != "$required_ios_version" ]; then
  echo "Device out of compliance: $current < $required_ios_version"
  exit 1
fi