Cisco Secure Firewall Snort 3 Detection Engine Vulnerability Enables DoS Attacks

Critical security flaw CVE-2025-20217 allows unauthenticated attackers to trigger denial-of-service conditions in Cisco’s widely deployed firewall systems Cisco has disclosed a high-severity vulnerability in its Secure Firewall Threat Defense (FTD) Software that could allow remote attackers to cause denial-of-service conditions through the Snort 3 Detection Engine. The vulnerability, tracked as CVE-2025-20217 with a CVSS score […]

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