The Hacker News·Jun 2, 2026 criticalGamaredon Exploits WinRAR to Deliver GammaWorm and GammaSteel Against Ukraine#cve-2025-8088#cve-2026-21509#vulnerability 3 min
Security Affairs·Apr 8, 2026 criticalRussia-linked APT28 uses PRISMEX to infiltrate Ukraine and allied infrastructure with advanced tactics#cve-2026-21509#cve-2026-21513#threat-actor 5 min
The Hacker News·Apr 8, 2026 criticalAPT28 Deploys PRISMEX Malware in Campaign Targeting Ukraine and NATO Allies#cve-2026-21509#cve-2026-21513#malware 4 min
The Hacker News·Mar 2, 2026 criticalAPT28 Tied to CVE-2026-21513 MSHTML 0-Day Exploited Before Feb 2026 Patch Tuesday#cve-2026-21513#cve-2026-21509#vulnerability 3 min1
Security Affairs·Feb 24, 2026Operation MacroMaze: APT28 exploits webhooks for covert data exfiltration#cve-2026-21509#threat-actor 4 min
Recorded Future·Feb 24, 2026 criticalJanuary 2026 CVE Landscape: 23 Critical Vulnerabilities Mark 5% Increase, APT28 Exploits Microsoft Office Zero#cve-2026-21509#cve-2026-23760#cve-2026-1281 in the wild 10 min1
Help Net Security·Feb 16, 2026 criticalFebruary 2026 Patch Tuesday forecast: Lots of OOB love this month#cve-2026-21509#cve-2025-8088#vulnerability 4 min1
The Hacker News·Feb 15, 2026 critical⚡ Weekly Recap: Proxy Botnet, Office Zero-Day, MongoDB Ransoms, AI Hijacks & New Threats#cve-2026-21509#cve-2026-1281#cve-2026-1340 in the wild 15 min
Security Affairs·Feb 8, 2026 highSecurity Affairs newsletter Round 562 by Pierluigi Paganini#cve-2026-21509#cve-2025-8088#breach 2 min
Help Net Security·Feb 8, 2026 criticalWeek in review: Notepad++ supply chain attack details and targets, Patch Tuesday forecast#cve-2026-21509#cve-2025-22225#cve-2026-24423 in the wild 12 min1
The Record·Feb 5, 2026 criticalRussian hackers targeting European maritime and transport orgs using Microsoft Office exploit#cve-2026-21509#vulnerability 2 min
Ars Technica · Security·Feb 4, 2026 criticalMicrosoft releases urgent Office patch. Russian#cve-2026-21509#vulnerability 2 min1
The Hacker News·Feb 4, 2026 highAPT28 Uses Microsoft Office CVE-2026-21509 in Espionage#cve-2026-21509#vulnerability 5 min1
Help Net Security·Feb 3, 2026 criticalMicrosoft reveals actively exploited Office zero-day, provides emergency fix (CVE-2026-21509)#cve-2026-21509#exploit in the wild 2 min
The Record·Feb 3, 2026 highRussian state hackers exploit new Microsoft Office flaw in attacks on Ukraine, EU#cve-2026-21509#exploit in the wild 2 min1
Security Affairs·Feb 3, 2026 criticalAPT28 exploits Microsoft Office flaw in Operation Neusploit#cve-2026-21509#threat-actor in the wild 4 min
Help Net Security·Feb 3, 2026 criticalRussian hackers are exploiting recently patched Microsoft Office vulnerability (CVE-2026-21509)#cve-2026-21509#vulnerability 2 min1
Help Net Security·Feb 1, 2026 criticalWeek in review: Microsoft fixes exploited Office zero-day, Fortinet patches FortiCloud SSO flaw#cve-2026-21509#cve-2026-24858#cve-2025-8088 in the wild 15 min
Cisco Talos·Jan 29, 2026 criticalMicrosoft releases update to address zero#cve-2026-21509#exploit in the wild 2 min
Security Affairs·Jan 27, 2026 criticalU.S. CISA adds Microsoft Office, GNU InetUtils, SmarterTools SmarterMail, and Linux Kernel flaws to its Known Exploited Vulnerabilities catalog#cve-2018-14634#cve-2025-52691#cve-2026-21509 in the wild 4 min
Infosecurity Magazine·Jan 27, 2026 criticalMicrosoft Releases Patch for Exploited Office Zero Day#cve-2026-21509#vulnerability in the wild2
The Hacker News·Jan 27, 2026 criticalMicrosoft Office Zero-Day (CVE-2026-21509) - Emergency Patch Issued for Active Exploitation#cve-2026-21509#exploit in the wild 3 min1
Security Affairs·Jan 26, 2026 criticalEmergency Microsoft update fixes in-the-wild Office zero#cve-2026-21509#exploit in the wild 2 min1