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Mallory
Medium

DoS via Snort 3 SSL packet inspection memory management logic error in Cisco Secure Firewall FTD

IdentifiersCVE-2026-20052

A vulnerability in the memory management handling for the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. The issue is due to a logic error in memory management when the device performs Snort 3 SSL packet inspection. An attacker can exploit this by sending crafted SSL packets through an established connection that are parsed by the Snort 3 Detection Engine, resulting in an unexpected restart of the engine and a denial-of-service condition.

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Denial of service against inspection capabilities due to an unexpected restart of the Snort 3 Detection Engine on Cisco Secure Firewall FTD when processing crafted SSL traffic during Snort 3 SSL packet inspection.
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VALID 0 / 0 TOTALView more in app

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