China-Linked Hackers Exploit CVE-2025-20393 Zero-Day Vulnerability

China-Linked Hackers Exploit CVE-2025-20393 Zero-Day Vulnerability

First seen 18 Dec 2025, 08:53 UTC •Feeds.FeedburnerTherecord.MediaSecurityboulevardVarindia •73% similarity •77.5

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China-linked hackers are exploiting a critical zero-day vulnerability tracked as CVE-2025-20393. This vulnerability affects Secure Email Gateway and Secure Email and Web Manager appliances, posing risks to organizations using these systems.

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Cisco Secure Email And Web Manager Appliances Secure Email Gateway Zero-day Exploit