The Russia-linked cyber espionage group known as Fancy Bear has launched Operation Neusploit. The group is also known as APT28. This marks a significant escalation, leveraging a zero-day vulnerability, CVE-2026-21509, in Microsoft RTF files. By exploiting this flaw, attackers execute arbitrary code on victim systems, deploying dangerous backdoors and email stealers. The campaign targets organizations […] The post Fancy Bear Hackers Exploiting Microsoft Zero-Day Vulnerability to Deploy Backdoors and Email Stealers appeared first on Cyber Security News.