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#1 CyberScoop general October 16, 2026 at 17:09 UTC

Prolific Chinese espionage group exploits BeyondTrust zero-day

By Matt Kapko

AI Summary

Chinese espionage group Armory Castle (UNC5221) is actively exploiting a BeyondTrust Remote Support zero-day (CVE-2026-102764) for espionage, with the first known attack occurring approximately seven weeks ago. The group, previously responsible for compromising Ivanti and Citrix customers, is deploying custom tools while deleting logs to cover tracks. Security practitioners should prioritize patching BeyondTrust Remote Support immediately, as this threat actor has a strong track record of operationalizing edge device vulnerabilities at scale.

Relevance score: 92.0/100

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