If you’re one of those Apple users that don’t bother updating your Mac, iPhone, or other device when a new version of its operating system is released, pay attention. Here’s an example of why you should keep your devices updated.
On August 6, Apple released macOS Tahoe 26.6.1, an update to the macOS Tahoe operating system for the Mac. The update patched a screen sharing flaw that has already been exploited in the wild, according to the Netherlands’ National Cyber Security Center (NCSC-NL).
Apple’s security support document noted that the update addressed a vulnerability that could allow an attacker to authenticate to Screen Sharing without valid credentials.
Screen Sharing
Available for: macOS Tahoe
Impact: An attacker on the network may be able to authenticate to Screen Sharing without valid credentials
Description: An authentication issue was addressed with improved state management.
CVE-2026-65400: Alfredo Pesoli (@__rev) via Bynario Atlas (bynar.io)
The flaw allows a bad actor to view a user’s Mac screen and remotely take control of their keyboard and mouse. As first reported by ArsTechnica, it appears that hackers have already been taking advantage of the flaw.
The report notes that the NCSC-NL said that it had been notified of abuse of the vulnerability, “observed on multiple systems on which port 5900 was accessible from the internet.” The flaw rears its ugly head when screen sharing is enabled, and macOS’s firewall intentionally exposes this port.
“In all these cases, root had been accessed on the affected system and a Monero crypto miner had been placed,” the NCSC-NL added. In other words, the bad guys targeted the Mac’s resources to perform a bit of cryptocurrency mining.
Alongside the macOS 26.6.2 update, Apple released iOS 26.6.1, iPadOS 26.6.1, and visionOS 26.6.1, all of which included security fixes. Also released were iOS 18.7.10 and iPadOS 18.7.10, also with security fixes.
On Monday, Apple again released updates, releasing iOS 26.6.1, iPadOS 26.6.1, macOS 26.6.2, and visionOS 26.6.1, all of which include security fixes. Also released were iOS 18.7.10 and iPadOS 18.7.10, also with security fixes.
To view the lengthy list of fixes, click here.
If you’re not sure if your Apple device’s software version is up-to-date, you can check by going into your device’s System Settings and selecting “General” -> “Software Update.”