This week, we look at how zero-day vulnerabilities fuel global cyberattacks, what major breaches really cost, and the privacy technologies that aim to contain the damage when systems fail.

#### One YouTube Video

This video unpacks the covert zero-day market, a hidden economy where governments, brokers, and attackers trade undisclosed software flaws for millions, enabling silent access to devices and critical systems.

#### One Podcast

In this interview, Nicole Perlroth walks through the zero-day market, how hacker culture and bug bounties evolved into a billion-dollar exploit economy, and why governments and criminals now compete for the same vulnerabilities.

#### One Report

IBM’s 2025 _Cost of a Data Breach_ report shows the average breach now costs $4.4M with long detection times and operational disruption. Instead of reactive security, it urges organisations to take action to improve resilience before it’s too late.

[**Read more**](https://www.ibm.com/reports/data-breach)

#### One Article

This article walks through eight major data breaches from recent years, showing how systemic weaknesses, rushed digital infrastructure, and poor governance exposed hundreds of millions of people.

[**Read more**](/content/blog/millions-exposed-a-look-at-the-8-biggest-data-breaches-since-2020/index.html)

#### One Competition

We’re opening applications for PET ARENA, a new CTF competition co-hosted with TikTok. It challenges participants to stress-test practical privacy technologies and explore how PETs minimise harm even when systems are compromised.

[**Read more**](https://www.antigranular.com/competitions/pet-arena-ctf-competition)

#### One Meme

Source: [Drata](https://drata.com/blog/cybersecurity-memes)