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Dennis Fisher

Editor in Chief

Dennis Fisher is an award-winning journalist who has been covering information security and privacy since 2000.

He is one of the co-founders of Threatpost and previously wrote for TechTarget and eWeek, when magazines were still a thing that existed. Dennis enjoys finding the stories behind the headlines and digging into the motivations and thinking of both defenders and attackers. His work has appeared in The Boston Globe, The Improper Bostonian, Harvard Business School’s Working Knowledge, and most of his kids’ English papers.

Featured Articles

1062 articles by Dennis Fisher

Attacks Against Citrix CVE-2023-3519 Bug Escalate

Three separate campaigns are targeting the critical flaw (CVE-2023-3519) in Citris NetScaler ADC and Gateway devices.


Decipher Podcast: Chris Kirsch

Chris Kirsch, CEO of runZero, joins Dennis Fisher to talk about the problem of trying to secure what you don't know you have, asset management, and his history in the original crypto war.


CISA: Old Bugs Still Get the Most Attention From Attackers

An analysis by CISA of commonly exploited vulnerabilities in 2022 shows that most of the targeted flaws are at least a year old and many are much older than that.

Government, Ciso

New Ivanti MobileIron Core Bug Emerges

Rapid7 researchers have found a new flaw (CVE-2023-35082) in Ivanti MobileIron Core 11.2 and earlier.


Less Than Zero Day: What’s Causing the Drop in Usage of Unknown Bugs

The number of zero days detected in the wild in 2022 dropped 40 percent from the previous year, but researchers say that doesn't mean we're getting better at security.

Zero Days, Google