suspected_chinese_nexus_threat_group
A suspected Chinese-nexus threat group reported by Cisco Talos as actively exploiting CVE-2025-20393, a critical unauthenticated remote command execution vulnerability in Cisco Secure Email Gateway and Cisco Secure Email and Web Manager. According to the provided content, the group has been compromising Cisco email security appliances since at least late November 2025, gaining root access, planting backdoors, and deploying log-purging tools on affected devices. The activity is described as in-the-wild exploitation against Cisco email security devices. No additional aliases, sub-groups, or attribution details beyond a suspected Chinese nexus are provided in the content.
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