New Actively Exploited CVSS 10 Flaw in Cisco AsyncOS Spam Quarantine Remote Access
A new maximum-severity zero-day vulnerability in Cisco AsyncOS was published in emergency fashion on Wednesday, December 17th. Cisco has indicated that the flaw, tracked as CVE-2025-20393, has been actively exploited in the wild by Chinese-nexus APT actors since late November 2025, and that it has been aware of the activity for at least a week […]



