Keeping Your Devices and Apps Updated

Why Updates Are Essential for Your Security

Software updates are one of the most effective defences against cyber attacks, yet they are often postponed or ignored. When developers discover security flaws in their software, they release updates (often called patches) to fix those vulnerabilities. If you delay or skip these updates, your devices remain exposed to attacks that exploit known weaknesses.

Cybercriminals actively scan for devices running outdated software because they know exactly which vulnerabilities exist and how to exploit them. In many major data breaches, the attackers exploited vulnerabilities for which patches were already available. The victims simply had not applied the updates.

What Is a Zero-Day Vulnerability?

A zero-day vulnerability is a security flaw that is discovered and exploited by attackers before the software developer knows about it or has had time to release a fix. The term "zero-day" refers to the fact that developers have had zero days to address the problem. These vulnerabilities are particularly dangerous because there is no patch available at the time of the attack.

In plain language, a zero-day is like discovering a lock on your front door has a hidden flaw that burglars already know about, but the lock manufacturer does not. Until they learn about it and send you a replacement, you are vulnerable. Once a zero-day vulnerability becomes known, developers typically rush to release a patch. This is why installing updates promptly is so critical: the moment a patch is available, you should apply it.

What Needs Updating

It is not just your operating system that needs regular updates. All software on your devices can contain vulnerabilities:

• Operating systems: Windows, macOS, iOS, Android, and Linux all receive regular security updates. These are your most important updates to apply promptly.
• Web browsers: Chrome, Firefox, Safari, and Edge are frequently updated to patch security flaws and protect against malicious websites.
• Apps: Both mobile and desktop applications, including KF.Social, receive updates that may include security fixes alongside new features.
• Firmware: Your router, smart devices, and other hardware also receive firmware updates that address security issues.
• Browser extensions and plugins: Outdated extensions can become attack vectors. Remove any you no longer use and keep the rest updated.

Enabling Auto-Update

The simplest way to stay protected is to enable automatic updates on all your devices. This ensures patches are applied as soon as they become available, without requiring you to remember to check manually.

On most devices, auto-update settings can be found in:

• Windows: Settings, then Update and Security, then Windows Update.
• macOS: System Preferences (or System Settings), then Software Update.
• iOS: Settings, then General, then Software Update, then Automatic Updates.
• Android: Settings, then System, then System Update (location varies by manufacturer).

For apps, ensure automatic updates are enabled in your device's app store:

• Apple App Store: Settings, then App Store, then enable App Updates.
• Google Play Store: Open the Play Store, tap your profile icon, then Settings, then Network Preferences, then Auto-update apps.

When to Update Manually

Even with auto-update enabled, there are situations where manual intervention is beneficial:

• After a major security incident is reported in the news, check for updates immediately rather than waiting for the automatic schedule.
• If your device has been powered off or disconnected from the internet for an extended period, check for accumulated updates when you reconnect.
• For critical applications such as your web browser or email client, verify they are running the latest version periodically.

The Risks of Ignoring Updates

Postponing updates creates a window of opportunity for attackers. Many forms of malware, including ransomware, spread by exploiting known vulnerabilities in unpatched software. The National Cyber Security Centre (NCSC) consistently emphasises that keeping software updated is one of the most important actions individuals and organisations can take to protect themselves online.

Taking a few minutes to ensure your devices and apps are up to date is a small investment that provides significant protection against a wide range of cyber threats.