CVE-2025-43281 is a vulnerability in Apple macOS that enables a local attacker to elevate their privileges due to insufficient authentication controls. The flaw was addressed by improving authentication mechanisms in macOS Sequoia 15.6. The vulnerability falls under CWE-287, indicating improper authentication, which can allow attackers with limited access to gain higher privileges, potentially full administrative rights. The CVSS v3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) indicates that the attack requires local access and low complexity, with no user interaction needed, and results in high confidentiality, integrity, and availability impacts. Although the affected versions are unspecified, it is implied that versions prior to 15.6 are vulnerable. No public exploits are known yet, but the vulnerability poses a significant risk due to the potential for privilege escalation, which could lead to unauthorized system control, data compromise, and disruption of services. The vulnerability is particularly critical in environments where multiple users share systems or where local access controls are weak.

This vulnerability allows local attackers to escalate privileges, potentially gaining administrative or root-level access on affected macOS systems. This can lead to full system compromise, unauthorized access to sensitive data, installation of persistent malware, and disruption of system availability. Organizations relying on macOS for critical operations, especially in sectors like technology, finance, and government, face risks of data breaches, intellectual property theft, and operational downtime. The ease of exploitation without user interaction increases the threat level in multi-user environments or where attackers have limited local access. The absence of known exploits currently limits immediate widespread impact, but the vulnerability remains a significant risk until patched.

1. Apply the macOS Sequoia 15.6 update immediately to all affected systems to remediate the vulnerability. 2. Restrict local access to macOS systems to trusted users only, minimizing the risk of local attackers exploiting this flaw. 3. Implement strict user account controls and monitor for unusual privilege escalations or suspicious local activity. 4. Employ endpoint detection and response (EDR) solutions capable of detecting privilege escalation attempts. 5. Regularly audit system logs for signs of unauthorized access or privilege changes. 6. Educate users about the risks of local access and enforce policies that prevent unauthorized physical or remote local access. 7. For environments where immediate patching is not feasible, consider temporary measures such as disabling unnecessary local accounts or services that could be leveraged for exploitation.