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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

1086 articles by Dennis Fisher

Winter Vivern APT Targets Zero Day in Roundcube

The Winter Vivern APT group has been targeting a zero day XSS vulnerability in the Roundcube webmail server in recent weeks.

Apt, Vulnerability

Decipher Podcast: Matt Donahue and Nick Selby

Dennis Fisher talks with Mat Donahue, a former FBI counterterrorism specialist and founder and CEO of Kodex, and Nick Selby, a technologist and law enforcement officer, about the challenges organizations face when responding to data requests from law enforcement agencies and how CISOs and legal teams can address them.


Cisco Releases Update for IOS XE Flaws

Cisco has released an update for two zero days in IOS XE that attackers have been exploiting in the wild.

Patch, Cisco

U.S., European Authorities Disrupt Ragnar Locker Ransomware Operation

Law enforcement agencies from Europe and the U.S. seized the infrastructure and arrested alleged members of the Ragnar Locker ransomware gang this week.


State Actors Targeting WinRAR Flaw in Multiple Campaigns

APT groups from Russia and China are targeting CVE-2023-38831 in WinRAR in multiple campaigns, deploying custom and commodity malware.

Russia, China