Gamaredon Exploits WinRAR to Deliver GammaWorm and GammaSteel Against Ukraine
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Stories tagged #cve-2026-21509
Russia-linked APT28 uses PRISMEX to infiltrate Ukraine and allied infrastructure with advanced tactics
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APT28 Deploys PRISMEX Malware in Campaign Targeting Ukraine and NATO Allies
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APT28 Tied to CVE-2026-21513 MSHTML 0-Day Exploited Before Feb 2026 Patch Tuesday
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Operation MacroMaze: APT28 exploits webhooks for covert data exfiltration
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January 2026 CVE Landscape: 23 Critical Vulnerabilities Mark 5% Increase, APT28 Exploits Microsoft Office Zero
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February 2026 Patch Tuesday forecast: Lots of OOB love this month
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⚡ Weekly Recap: Proxy Botnet, Office Zero-Day, MongoDB Ransoms, AI Hijacks & New Threats
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Security Affairs newsletter Round 562 by Pierluigi Paganini
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Week in review: Notepad++ supply chain attack details and targets, Patch Tuesday forecast
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Russian hackers targeting European maritime and transport orgs using Microsoft Office exploit
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Microsoft releases urgent Office patch. Russian
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APT28 Uses Microsoft Office CVE-2026-21509 in Espionage
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Microsoft reveals actively exploited Office zero-day, provides emergency fix (CVE-2026-21509)
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Russian state hackers exploit new Microsoft Office flaw in attacks on Ukraine, EU
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APT28 exploits Microsoft Office flaw in Operation Neusploit
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Russian hackers are exploiting recently patched Microsoft Office vulnerability (CVE-2026-21509)
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Week in review: Microsoft fixes exploited Office zero-day, Fortinet patches FortiCloud SSO flaw
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Microsoft releases update to address zero
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U.S. CISA adds Microsoft Office, GNU InetUtils, SmarterTools SmarterMail, and Linux Kernel flaws to its Known Exploited Vulnerabilities catalog
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Microsoft Releases Patch for Exploited Office Zero Day
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Microsoft Office Zero-Day (CVE-2026-21509) - Emergency Patch Issued for Active Exploitation
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Emergency Microsoft update fixes in-the-wild Office zero
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