CVE-2025-43467: 
macOS vulnerability analysis and mitigation

CVE-2025-43467 is a privilege escalation vulnerability in Apple macOS affecting the Installer component. A malicious application may be able to gain root privileges by exploiting this flaw. It affects all macOS versions prior to macOS Tahoe 26.1 and was fixed in that release on November 3, 2025. The CVE was published by Apple on December 12, 2025. It carries a CVSS v3.1 base score of 7.8 (High), as assessed by CISA-ADP (Apple Advisory).

The vulnerability resides in the macOS Installer component and was addressed with improved checks, suggesting insufficient input validation or logic errors that allowed privilege escalation to root. The root cause is classified as CWE-noinfo (Insufficient Information) by NVD, indicating Apple has not publicly disclosed the precise technical mechanism. The attack vector is local (AV:L), requiring low privileges and no user interaction, meaning a sandboxed or low-privileged malicious application could exploit this to escalate to root. The vulnerability was discovered and reported by Mickey Jin (@patch1t) (Apple Advisory).

Successful exploitation allows a malicious application to gain root privileges on the affected macOS system, resulting in high confidentiality, integrity, and availability impact. An attacker achieving root access could read sensitive user data, modify system files, install persistent malware, or fully compromise the host. The scope is limited to the local system, but root-level access could facilitate further lateral movement within a network environment (Apple Advisory).

Apple has addressed this vulnerability in macOS Tahoe 26.1, released November 3, 2025. Users and administrators should update all affected macOS systems to version 26.1 or later as the primary remediation. No official workarounds have been published by Apple for systems that cannot be immediately updated. Organizations should prioritize patching given the root privilege escalation impact (Apple Advisory).

The SANS Internet Storm Center noted the macOS Tahoe 26.1 security update in a diary entry covering the broader release. The Center for Internet Security (CIS) published an advisory noting that multiple vulnerabilities in Apple products, including those addressed in macOS Tahoe 26.1, could allow for arbitrary code execution. No significant individual researcher commentary or social media discussion specific to CVE-2025-43467 has been identified beyond standard vulnerability tracking (SANS ISC, CIS Advisory).