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VulnU Premium - 001 - Robert "RSnake" Hansen
LockSimple

Aug 20, 2025

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13 min read

VulnU Premium - 001 - Robert "RSnake" Hansen

How this security expert metabolized unimaginable grief and rewired his brain for what came next.

Matt Johansen
Matt Johansen

Newsletter

🎓️ Vulnerable U | #129

Aug 15, 2025

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17 min read

🎓️ Vulnerable U | #129

So. Much. Blackhat/DEFCON research. Prompt injections, CyberArk and HashiCorp Vault zero days, DEFCON volunteers helping rural water utilities, and much more!

Matt Johansen
Matt Johansen

Newsletter

🎓️ Vulnerable U | #128

Aug 8, 2025

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13 min read

🎓️ Vulnerable U | #128

Tons of blackhat research coming out, Microsoft Exchange major vulnerability, DaVita data breach, Federal court filing system breach, and much more!

Matt Johansen
Matt Johansen

Newsletter

🎓️ Vulnerable U | #127

Aug 1, 2025

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15 min read

🎓️ Vulnerable U | #127

Russian ISP hacked, Spilled Tea, New Ransomware data, A ton of scamming gaming sites, and much more!

Matt Johansen
Matt Johansen

Newsletter

🎓️ Vulnerable U | #126

Jul 25, 2025

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14 min read

🎓️ Vulnerable U | #126

SharePoint!!!! - oh and other things: Massive npm supply chain attack, Trump's AI Action Plan, A few law enforcement wins, and much more!

Matt Johansen
Matt Johansen

Newsletter

🎓️ Vulnerable U | #125

Jul 18, 2025

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12 min read

🎓️ Vulnerable U | #125

Hackers using AI in new ways, Soldier pleads guilty to hacking and extortion, Salt Typhoon undetected in gov network for 9 months, and more!

Matt Johansen
Matt Johansen

Newsletter

🎓️ Vulnerable U | #124

Jul 11, 2025

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12 min read

🎓️ Vulnerable U | #124

Scattered Spider arrests, A bunch of sneaky extension malware, LLMs are the new SEO poisoning for phishing links, and much more!

Matt Johansen
Matt Johansen

Newsletter

🎓️ Vulnerable U | #123

Jul 4, 2025

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13 min read

🎓️ Vulnerable U | #123

Critical Cisco Backdoor, New macOS malware disguised as Zoom updates, Ransomware negotiator was being paid by ransomware operators, and much much more!

Matt Johansen
Matt Johansen

cybercrime

+1

Cartel Hacker Turned an FBI Agent’s Phone into a Hit List

Jul 2, 2025

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6 min read

Cartel Hacker Turned an FBI Agent’s Phone into a Hit List

How a single phone number, leaky telecom data, and a city-wide camera grid helped the Sinaloa cartel hunt, and reportedly kill, U.S. informants.

Newsroom
Newsroom

Newsletter

🎓️ Vulnerable U | #122

Jun 27, 2025

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16 min read

🎓️ Vulnerable U | #122

Double Cisco CVSS 10 vulns, CitrixBleed2 Electric Bungaloo, North Koreans hiding malware in npm, Detection Engineering Field Manual, and much more!

Matt Johansen
Matt Johansen

Newsletter

🎓️ Vulnerable U | #121

Jun 20, 2025

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15 min read

🎓️ Vulnerable U | #121

Data brokers enabling violence, New trick to use discord to spread malware, Widespread Grafana account takeover bug,

Matt Johansen
Matt Johansen

News

Data Brokers and the 2025 Minnesota Lawmaker Shooting

Jun 19, 2025

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6 min read

Data Brokers and the 2025 Minnesota Lawmaker Shooting

An inside look at Vance Boelter’s use of 11 people-search services to track and attack officials, and why weak U.S. privacy laws still leave every home address exposed.

Matt Johansen
Matt Johansen
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Vulnerable U

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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