Redhotcyber Cisco Email Security Products Targeted in Zero-Day Campaign by China-Linked Actors
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Cisco has confirmed a zero-day vulnerability (CVE-2025-20393) in its Secure Email appliances that is being exploited by actors linked to China. The attackers have deployed the Aquashell backdoor to establish persistence within affected systems.
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Critical Cisco Secure Email Gateway Vulnerability Exploited Cisco has disclosed a critical vulnerability in its Secure Email Gateway (SEG), tracked as CVE-2026-76519, which allows unauthenticated remote attackers to execute commands with root privileges. This flaw arises from improper handling of email attachments when the File Reputation service is enabled. Active… 
Critical BeyondTrust 9.3 Vulnerability Actively Exploited by Threat Actor A critical vulnerability (CVE-2026-102764) in BeyondTrust Remote Support has been discovered and is actively being exploited by the threat group ARMORY CASTLE, reportedly linked to China. The vulnerability, which has a CVSS score of 9.3, allows unauthenticated attackers to upload files and potentially compromise host…