🔴 Critical: China-Linked Hackers Exploited BeyondTrust Zero-Day to Take Over Remote Support Servers
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A China-nexus cyber espionage group tracked as Armory Castle, previously known as UNC5221 or Warp Panda, exploited a newly disclosed flaw in BeyondTrust Remote Support (formerly Bomgar) as a zero-day in late August 2026.
The vulnerability is tracked as CVE-2026-102764 and carries a CVSS score of 9.3. It stems from improper origin validation in an internal messaging component, allowing attackers to take over remote support servers.
Key details:
- Targeted product: BeyondTrust Remote Support (formerly Bomgar)
- Threat actor: Armory Castle (also tracked as UNC5221 / Warp Panda)
- Exploitation window: late August 2026, as a zero-day
- Vulnerability type: improper origin validation in an internal messaging component
- Severity: CVSS 9.3
Organizations running BeyondTrust Remote Support should treat this as high priority given active exploitation in the wild.
Source: [email protected] (The Hacker News)
Has your organization reviewed its BeyondTrust Remote Support deployment for exposure tied to this campaign?
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