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Author Bio


Dennis Fisher

Editor

Dennis Fisher is an award-winning journalist and author. He is one of the co-founders of Decipher and Threatpost and has been writing about cybersecurity since 2000. Dennis enjoys finding the stories behind the headlines and digging into the motivations and thinking of both defenders and attackers. He is the author of 2.5 novels and once met Shaq. Contact: dennis at decipher.sc.

dennis@decipher.sc

Featured Articles


white cloud on a blue sky

Vercel Says Internal Systems Hit in Breach

The incident came to light on Sunday and the company says it has brought in an incident response provider to investigate the intrusion. Details of the intrusion are scant at this point.

By Dennis Fisher

April 21, 2026 | 3 min read

AIData breach

Claude Mythos, Automated Bug Hunting, and AI Eating Everything

It’s been A WEEK. Security news never sleeps, and neither does AI, so Dennis and Lindsey dive into all of the storylines coming from the Claude Mythos and Project Glasswing announcements, how organizations will deal with the coming flood of CVEs and patches, NIST’s decision to only enrich specific CVEs going forward, and what could possibly be next on […]

By Dennis Fisher

April 17, 2026 | 1 min read

AIPodcast

New Campaign Targets Mac Users With Novel Malware

The campaign targets high-value individuals and organizations in the cryptocurrency, digital assets, and finance sectors.

By Dennis Fisher

April 16, 2026 | 3 min read

AppleMicrosoft

Myths and Mythos: An AI Vulnerability Research FAQ

It’s still very early days for all of this, and relatively little is known about Claude Mythos’s real capabilities, so we wanted to dig into what actually is known and what it all means. 

By Dennis Fisher

April 14, 2026 | 6 min read

AIMicrosoftVulnerability

The Era of AI-Led Vulnerability Research With Tom Ptacek

Dennis sits down with Tom Ptacek of Fly.io, a veteran security researcher, founder, and observer of the vulnerability landscape, to talk about the recent wave of AI-assisted vulnerability discovery and exploit development, specifically from the use of frontier models such as Claude Mythos. Tom has strong opinions on what’s coming and how human researchers and […]

By Dennis Fisher

April 13, 2026 | 1 min read

AIPodcastVulnerability

Mapping the Cybercrime Ecosystem With Andrew Northern of Censys

The internet is dark and full of terrors, but thanks to folks such as Andrew Northern, a principal security researcher at internet-mapping pioneer Censys, it doesn’t have to be, Andrew joins Dennis to talk about the cybercrime ecosystem, getting his start in security on a tiny team with huge responsibilities, and the value of a […]

By Dennis Fisher

April 9, 2026 | 1 min read

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