New PDFSider Windows malware deployed on Fortune 100 firm's network

Published on January 19, 2026

Ransomware attackers targeting a Fortune 100 company in the finance sector used a new malware strain, dubbed PDFSider, to deliver malicious payloads on Windows systems. [...]

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Google Gemini Prompt Injection Flaw Exposed Private Calendar Data via Malicious Invites

January 19, 2026
Cybersecurity researchers have disclosed details of a security flaw that leverages indirect prompt injection targeting Google Gemini as a way to bypass authorization guardrails and use Google Calendar as a data extraction mechanism.The vulnerability, Miggo Security's Head of Research, Liad Eliyahu, said, made it possible to circumvent Google Calendar's privacy controls by hiding a dormant

Fake ad blocker extension crashes the browser for ClickFix attacks

January 19, 2026
A malvertising campaign is using a fake ad-blocking Chrome and Edge extension named NexShield that intentionally crashes the browser in preparation for ClickFix attacks. [...]