Cisco email security appliances rooted and backdoored via still unpatched zero-day

TL;DR


Summary:
- Cisco has discovered a critical vulnerability in its Secure Email product that could allow attackers to execute arbitrary code on affected systems.
- The vulnerability, identified as CVE-2025-20393, is rated as critical and has a severity score of 9.8 out of 10.
- Cisco has released software updates to address the vulnerability and urges users to apply the patches as soon as possible to protect their systems from potential exploitation.

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