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Actively Exploited Zero-Days in Microsoft Office & Fortinet; Major Brands Hit by Cyberattacks

Actively Exploited Zero-Days in Microsoft Office & Fortinet; Major Brands Hit by Cyberattacks

January 29, 2026
8 articles (7 new, 1 updated)
24 min read

Summary

This 24-hour period saw critical cybersecurity developments, including the active exploitation of zero-day vulnerabilities in Microsoft Office (CVE-2026-21509) and Fortinet's FortiCloud SSO (CVE-2026-24858), both added to CISA's KEV list. A wave of social engineering attacks impacted major brands like Bumble, Match, Panera, and Crunchbase, attributed to the 'ShinyHunters' group. Additionally, significant data breaches were reported at SoundCloud, affecting 29.8 million users, and the Illinois Department of Human Services, exposing data of 700,000 individuals. Research reports from Check Point and Sonatype highlight the increasing use of AI by attackers and a 75% surge in open-source malware, underscoring the escalating complexity of the threat landscape.

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