Cisco Talos publishes threat research, vulnerability advisories and analysis of emerging attack trends, including detection and coverage guidance for Cisco customers. Recent posts cover critical PHP flaws, abuse of legitimate platforms for phishing delivery, and the surge in AI-discovered vulnerabilities.

404 Media is an independent tech journalism outlet whose newsletter covers investigative stories on surveillance, identity theft, fraud, and the physical impacts of technology such as data centers. Readers get long-form reporting that centers affected people and digs into how systems fail in practice.

A threat intelligence newsletter that turns recent public reporting on cyber espionage, exploitation and state-linked contractors into strategic judgments for defenders. Each issue separates what is known from what is plausible and ends with a concrete check or decision for security teams.

Posts from NLnet Labs, the maker of open-source internet infrastructure software such as Unbound, NSD and Routinator. Readers get first-hand accounts of security audits, regulatory impact on open source, and how AI affects maintaining critical software.