Russia-linked hackers from APT28 have launched a sneaky attack called Operation Neusploit. In January 2026, Zscaler ThreatLabz spotted them using crafted RTF files to exploit a zero-day flaw in Microsoft Office, CVE-2026-21509. This hits users in Central and Eastern Europe, like Ukraine, Slovakia, and Romania. The goal? Drop backdoors for spying and stealing data. Microsoft […] The post APT28 Hackers Exploit Microsoft Office Zero-Day In Active Malware Campaign appeared first on Cyber Security News.