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Matt Johansen's free weekly newsletter for security enthusiasts.

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๐ŸŽ“๏ธ Vulnerable U | #183
Aug 28, 2026

๐ŸŽ“๏ธ Vulnerable U | #183

OpenAI detailed Hugging Face report, GTA 6 leaks, Omarchy 0days, TeamPCP arrests, and much more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #182
Aug 21, 2026

๐ŸŽ“๏ธ Vulnerable U | #182

Rust supply chain attack, Big crypto stealing browser extension campaign, AI is critical Infrastructure now, and much more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #181
Aug 14, 2026

๐ŸŽ“๏ธ Vulnerable U | #181

Delta WiFi Hack from DEFCON, Defendant hides AI prompt in court documents, Whitehouse enables privateering hackers, and more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #180
Aug 07, 2026

๐ŸŽ“๏ธ Vulnerable U | #180

Rogue AI hackers follow ups, Blackhat and DEFCON research dropping, Water plants not pulling PLCs off the internet fast enough, and much more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #179
Jul 31, 2026

๐ŸŽ“๏ธ Vulnerable U | #179

More AIs escaping labs, FCC cracks down on foreign hardware, Amazon selling pre-hacked streaming sticks, and more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #178
Jul 24, 2026

๐ŸŽ“๏ธ Vulnerable U | #178

AI escaped the lab, Jim Cramer calls Chinese models a huge risk, and an absolute ton of vulns in active exploitation you need to know about

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #177
Jul 17, 2026

๐ŸŽ“๏ธ Vulnerable U | #177

Record breaking patch tuesday, AI 0days, Hacker perp walks, job interviews that get you hacked, and much more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #176
Jul 10, 2026

๐ŸŽ“๏ธ Vulnerable U | #176

Microsoft ID used to track hackers in court case, Vidar infostealer intel breakdown, Zero days to watch out for, and much more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #175
Jul 03, 2026

๐ŸŽ“๏ธ Vulnerable U | #175

Free Fable! Fortibleed updates, New Citrix and Oracle active attacks, and much more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #174
Jun 26, 2026

๐ŸŽ“๏ธ Vulnerable U | #174

Fortibleed is a bigger nightmare than we thought, Scattered Spider members go to jail, LastPass has another breach this time via Salesforce, and much more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
๐ŸŽ“๏ธ Vulnerable U | #173
Jun 19, 2026

๐ŸŽ“๏ธ Vulnerable U | #173

Free Mythos! Fortinet having massive security issues, FIFA has a near miss on massive security vulnerability in the World Cup streams, and much more!

Matt Johansen
Matt Johansen
NewsletterNewsletter
Vulnerable U | #172
Jun 12, 2026

Vulnerable U | #172

Mythos and Fable updates, AI agents falling for phishing emails, Iran hacked California water providers, ServiceNow breach, and more!

Matt Johansen
Matt Johansen
Infosec's favorite weekly newsletter for news, tools, and tips with 38,000+ CISOs, founders, change-makers, and straight up hackers.

Vulnerable U

Infosec's favorite weekly newsletter for news, tools, and tips with 38,000+ CISOs, founders, change-makers, and straight up hackers.

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