How can a normal online ad hack your phone without you clicking anything, and how do you lower your risk?

Citizen Lab researchers found evidence that targeted online ads delivered zero-click spyware — no tap needed. Most people are not the target, but updates, regular restarts, and Lockdown Mode or Advanced Protection cut the risk.

You are reading an ordinary article when an ad loads in the corner of the page. You never touch it — yet in that split second, your phone can be compromised. Short answer: Yes, this is real.

Researchers at Citizen Lab reported evidence that targeted online ads were used to deliver zero-click exploits — attacks that install spyware without a single tap — with Ars Technica and TechCrunch both reporting the findings on October 15, including a case involving an Al Jazeera journalist. “Zero-click” means the attack abuses a flaw in code that processes content automatically, such as the parts of a phone that render ads, images, and previews. Because ad systems can aim ads at a very narrow audience, a malicious buyer can effectively serve the exploit to one chosen person.

This is mercenary-spyware territory: costly, deliberate targeting aimed mainly at journalists, activists, executives, and public officials — not a net dragged across the general public. Still, the defenses are simple, and they blunt plenty of everyday attacks too.1. Install updates promptly.

System and app updates close the exact flaws these exploits need. Turn on automatic updates for the phone and the browser.2. Restart your phone regularly.

Many implants live only in memory and do not survive a reboot — a weekly restart is cheap insurance.3. High-risk? Turn on the strong modes. iPhone Lockdown Mode and Android’s Advanced Protection strip away much of the attack surface — worth it if your job could make you a target.4.

Use a reputable content blocker, cautiously. Blocking ad networks means fewer ads ever render on your phone; choose a well-known blocker and keep it updated.5. Ignore “your phone is infected” pop-ups.

Real spyware never announces itself — those warnings are ordinary scams.Pro tip: The common mistake is assuming a brand-new phone is immune. Risk follows who you are and what you do, not the price of your handset.Ad’s take: Most of us will never be worth spyware this expensive — but the same updates and restarts that blunt it stop everyday junk too. Stay current, reboot weekly, carry on.