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CVE-2025-20393: Cisco AsyncOS Zero-Day Impacts Secure Email Appliances

CVE-2025-20393: Cisco AsyncOS Zero-Day Impacts Secure Email Appliances

vm_adminDecember 18, 2025

By SOCRadar® Cyber Intelligence Inc.
Publication Date: 2025-12-18 10:25:00

CVE-2025-20393 (CVSS 10.0) is a zero-day vulnerability in Cisco AsyncOS Software, the operating system used by Cisco Secure Email Gateway…

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Tagged appliances, AsyncOS, cisco, CVE202520393, Email, Impacts, secure, zeroday

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