Serious Security Flaw Found in Apple Mac Computers

A serious security problem in Apple’s macOS is causing concern for computer users around the world. Security officials in the Netherlands have warned that hackers are actively using this flaw to take control of Apple computers. This issue, which is officially tracked as CVE-2026-65400, allows attackers to run harmful programs on a user's machine without needing a password or permission.

According to Ars Technica, the problem exists within the screen sharing feature of Apple devices. This feature is designed to let users view their screen and control their keyboard and mouse from a distance. However, a technical error in how the system manages user interactions allows an attacker to bypass security protections. Once inside, these attackers can gain 'root' access, which means they have total control over the entire computer system.

The Netherlands National Cyber Security Centrum (NCSC) reported that they have seen this vulnerability being used on multiple systems. In these cases, the attackers were able to install software to mine for Monero, a type of digital money known as cryptocurrency. By using the victim's computer power to mine this currency, the hackers can make money at the expense of the computer owner. The NCSC noted that these attacks were observed on systems where port 5900—a digital connection point used for screen sharing—was left open to the internet.

This security flaw was first brought to public attention during the Black Hat security conference held last week. Following the discovery, Apple released a software patch—a small piece of code designed to fix a problem—for users of macOS Tahoe, Sequoia, and Sonoma. Apple stated that this flaw may allow an attacker without login details to gain access to a Mac. While the company used careful language in their announcement, experts agree that the risk is real and significant. The vulnerability has been given a severity rating of 7.1 out of 10, which indicates a high level of danger.

For many users, the most important step is to check if their screen sharing settings are turned on. If this feature is active and accessible from the internet, the computer is at a much higher risk of being targeted. Security experts suggest that users should immediately update their macOS to the latest version provided by Apple. This update includes the necessary patch to close the hole that hackers are currently using.

This situation is an update to previous reports regarding the same vulnerability. Earlier this month, it was confirmed that the flaw was being used in the real world to compromise user privacy and system security. The fact that attackers are still trying to find and use these weaknesses shows why it is so important for all computer users to keep their software up to date. When a company like Apple releases a security fix, it is usually because they have found a way for bad actors to break into systems.

Looking ahead, this event serves as a reminder of how interconnected our devices are. Features that make our lives easier, like being able to share a screen from anywhere, can also become a door for hackers if they are not properly protected. As technology continues to evolve, the battle between software developers and those who want to exploit security gaps will likely continue. For now, the best defense for any Mac user is to install the latest security updates as soon as they become available and to be careful about which features are left open to the public internet.