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CVE-2025-20393

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Cisco Finaly Patches Critical AsyncOS Zero-Day: CVE-2025-20393

Cisco Finaly Patches Critical AsyncOS Zero-Day: CVE-2025-20393

Cisco has released patches for a maximum-severity AsyncOS vulnerability (CVE-2025-20393) that was actively exploited by a China-linked APT group since November 2025. The flaw, carrying a CVSS score of 10.0,…
Posted by PravinKarthik January 16, 2026
Cisco Hits Perfect 10 with Secure Email Gateway Bug

Cisco Hits Perfect 10 with Secure Email Gateway Bug

Cisco’s CVE-2025-20393 is a CVSS 10.0 zero-day in Cisco AsyncOS that gives unauthenticated attackers full root control over Cisco Secure Email Gateway and Secure Email and Web Manager when the…
Posted by PravinKarthik December 18, 2025
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