iOS 18.3 Urgent Update: Critical Security Fixes You Must Install Now

Apple has officially released iOS 18.3, urging all iPhone users to update immediately due to critical security vulnerabilities. This latest update patches 29 security flaws, including one that has already been exploited by hackers.

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• 1 Why You Should Update to iOS 18.3 Now
• 2 Key Security Fixes in iOS 18.3
• 3 Apple Extends Security Fixes to Other Devices
• 4 No iOS 17.7.4 Update Yet – What It Means
• 5 Expert Advice: Update Immediately
• 6 How to Update to iOS 18.3
• 7 Final Thoughts
• 8 Share this:
• 9 Like this:

Why You Should Update to iOS 18.3 Now

Apple’s security updates are designed to protect users from cyber threats, and iOS 18.3 is no exception. The update addresses multiple vulnerabilities that could allow hackers to gain control of your device, execute malicious code, or compromise your personal data.

One of the most critical vulnerabilities, tracked as CVE-2025-24085, affects CoreMedia and could enable a malicious app to elevate privileges, potentially allowing hackers to take over your iPhone. Apple has confirmed that this flaw has already been exploited in previous iOS versions before iOS 17.2.

Key Security Fixes in iOS 18.3

1. Kernel Vulnerabilities (CVE-2025-24107)
   • A flaw that allows a malicious app to gain root privileges.
   • Another issue that enables apps to execute code with Kernel-level access, giving attackers full control over the device.
2. WebKit Security Flaws
   • WebKit, the engine behind Safari, had multiple vulnerabilities that could lead to command injection, allowing hackers to execute system commands.
3. AirPlay Exploit (CVE-2025-24137)
   • A bug that could let remote attackers crash applications or execute malicious code via AirPlay.
4. Passkeys and Bluetooth Exploits
   • A security flaw in Passkeys that could allow unauthorized access to Bluetooth connections.

Apple Extends Security Fixes to Other Devices

Alongside iOS 18.3, Apple has released updates for other platforms, including:

• iPadOS 18.3 & iPadOS 17.7.4
• macOS Sequoia 15.3, macOS Sonoma 14.7.3, macOS Ventura 13.7.3
• watchOS 11.3, tvOS 18.3, visionOS 2.3
• Safari 18.3

These updates fix many of the same vulnerabilities, ensuring a more secure Apple ecosystem.

No iOS 17.7.4 Update Yet – What It Means

Apple has not released an iOS 17.7.4 update, raising questions about whether iOS 17 users are affected or if Apple has stopped providing security updates for older devices. This makes upgrading to iOS 18.3 even more critical for security.

Expert Advice: Update Immediately

Security experts strongly recommend updating to iOS 18.3 as soon as possible. According to Sean Wright, head of application security at Featurespace, the Kernel vulnerabilities are the most concerning, as they could allow an attacker to gain full control of a device.

Wright also warns that these flaws could be combined with other exploits (such as CVE-2025-24150) to enable remote attacks.

How to Update to iOS 18.3

To install the latest update:

1. Open Settings on your iPhone.
2. Go to General > Software Update.
3. Tap Download and Install.

Final Thoughts

Apple’s iOS 18.3 update is essential for protecting your iPhone from cyber threats. With critical security flaws already being exploited, delaying this update could put your personal data and device at risk. Update now to stay safe.