CVE-2025-46279: 
macOS vulnerability analysis and mitigation

CVE-2025-46279 is a permissions issue in Apple's Icons subsystem that allows an installed app to identify what other apps a user has on their device. The vulnerability was disclosed on December 12, 2025, when Apple released patches across its operating system lineup. Affected platforms include iOS and iPadOS (before 18.7.3 and before 26.2), macOS Tahoe (before 26.2), tvOS (before 26.2), visionOS (before 26.2), and watchOS (before 26.2). It carries a CVSS v3.1 base score of 3.3 (Low) per NVD's assessment, though CISA-ADP assigned a separate score of 9.8 (Critical) reflecting a broader attack surface interpretation (Apple Advisory iOS 26.2, Apple Advisory iOS 18.7.3).

The vulnerability is rooted in insufficient access controls within Apple's Icons subsystem (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor), where an app could query icon-related APIs or resources to enumerate which other applications are installed on the device without appropriate permission restrictions. Apple addressed the issue by applying additional restrictions to the permissions model governing this subsystem. Exploitation requires local access with low privileges — a malicious app already installed on the device — and no user interaction is needed. The vulnerability was discovered and reported by Duy Trần (@khanhduytran0) (Apple Advisory iOS 26.2, Apple Advisory macOS Tahoe 26.2).

Successful exploitation allows a malicious app to build a profile of other applications installed on a victim's device, which is a privacy violation that can facilitate targeted social engineering, fingerprinting, or reconnaissance for follow-on attacks. For example, knowing that a user has banking, VPN, or security apps installed could help an attacker tailor phishing campaigns or identify high-value targets. The impact is limited to confidentiality (no integrity or availability impact), and exploitation is constrained to the local device context without privilege escalation (Apple Advisory iOS 18.7.3, Apple Advisory tvOS 26.2).

Apple has released patches addressing this vulnerability across all affected platforms. Users should update to iOS 18.7.3 or iPadOS 18.7.3 (for legacy devices), or iOS 26.2 / iPadOS 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, and watchOS 26.2. No configuration-based workarounds have been published; updating to a patched OS version is the only recommended remediation. Users should also exercise caution when installing third-party apps from untrusted sources to reduce exposure (Apple Advisory iOS 18.7.3, Apple Advisory macOS Tahoe 26.2).

The vulnerability was noted in community security tracking resources such as Reddit's CVEWatch and security news aggregators shortly after disclosure. Coverage was largely bundled with the broader December 2025 Apple security update cycle, which also included more severe WebKit zero-days (CVE-2025-43529, CVE-2025-14174) that attracted greater attention. No significant standalone commentary from major security researchers specifically focused on CVE-2025-46279 has been identified beyond standard patch advisory coverage (9to5Mac).