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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


The Zero Day Landscape, Tycoon 2FA Disruption, and KEVology

Every day is zero day, and this week we talked about the new Google Threat Intelligence Group report on the zero day exploit landscape in 2025 (2:22) and who’s exploiting what, then we discuss Microsoft’s disruption of the Tycoon 2FA cybercrime operation (9:51), and finally we talk about the KEVology report from runZero and our […]

By Dennis Fisher

March 6, 2026 | 1 min read

CISAGoogleMicrosoftPodcast

Microsoft, Europol Disrupt Tycoon 2FA Phishing Service

The comprehensive effort, which involved seizing 330 active domains, cuts off a critical pipeline for account takeovers that targeted over 500,000 organizations and sent tens of millions of fraudulent emails monthly.

By Dennis Fisher

March 4, 2026 | 3 min read

MalwareMicrosoft

Q&A: Tod Beardsley on How to Use CISA’s KEV Catalog

Without context, the KEV catalog is just a very large collection of data. Tod Beardsley is the former CISA KEV section chief, and he recently released a paper called KEVology that provides key context and evaluates the value of certain enrichment signals.

By Dennis Fisher

March 3, 2026 | 4 min read

CISAVulnerability

We Need to Talk About KEV With Tod Beardsley

Tod Beardsley, VP of security research at runZero and former KEV section chief at CISA, joins Dennis Fisher to talk about the evolution of the Known Exploited Vulnerabilities catalog, how much value defenders should place on a specific bug being in the KEV, and his new KEVology report that breaks down all of the data […]

By Dennis Fisher

March 2, 2026 | 1 min read

VideoVulnerability

Cisco SD-WAN Zero Day, Google Disrupts Chinese Campaign, and More Cyber on The Pitt

This week Lindsey rejoins Dennis to talk about the attacks targeting a zero day in Cisco’s Catalyst SD-WAN Controller (2:17), Google’s disruption of a China-linked cyber espionage campaign targeting telecom infrastructure (6:30), and the new cyber developments on everyone’s favorite tech show, The Pitt (13:13)!

By Dennis Fisher

February 27, 2026 | 1 min read

PodcastRansomware
Fiber optic cables

Cisco, NSA Warn of Attacks Targeting Catalyst SD-WAN Zero Day

Cisco released software updates on Feb. 25 to fix the vulnerability, which affects both on-premises and cloud deployments of the Catalyst SD-WAN Controller. 

By Dennis Fisher

February 26, 2026 | 2 min read

CiscoVulnerability
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