CVE-2025-20153

Summary

CVE-2025-20153 is a vulnerability affecting Cisco Secure Email Gateway's email filtering mechanism. It allows unauthenticated, remote attackers to bypass configured rules, enabling the transmission of malicious emails. The issue arises from improper email handling, enabling crafted emails to bypass email filters on the affected device, potentially compromising security. Successful exploitation could lead to the delivery of unwanted or harmful content to intended recipients. Organizations using Cisco Secure Email Gateway are advised to update their software to mitigate this risk.

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