China-Linked Hackers Exploiting Zero

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China-Linked Hackers Exploiting Zero

Feeds.Feedburner •Eduard Kovacs • December 18, 2025

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The critical zero-day is tracked as CVE-2025-20393 and it impacts Secure Email Gateway and Secure Email and Web Manager appliances.

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

China-Linked Hackers Exploit CVE-2025-20393 Zero-Day Vulnerability 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. 4 sources 77

Extracted Entities

Attack Types (1)

Zero-day Exploit

CVEs (1)

Platforms (2)

Secure Email And Web Manager Appliances Secure Email Gateway