CVE-2024-20407: medium-severity vulnerability in Cisco Firepower Threat Defense Software
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.8epss 0.4%
A vulnerability in the interaction between the TCP Intercept feature and the Snort 3 detection engine on Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured policies on an affected system. Devices that are configured with Snort 2 are not affected by this vulnerability.
This vulnerability is due to a logic error when handling embryonic (half-open) TCP connections. An attacker could exploit this vulnerability by sending a crafted traffic pattern through an affected device. A successful exploit could allow unintended traffic to enter the network protected by the affected device.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Affected products
Cisco · Cisco Firepower Threat Defense SoftwareRelated CVEs — Cisco Firepower Threat Defense Software
In the same product, most dangerous first.
CVE-2024-20353HIGHCVE-2024-20353EPSS 69.8%KEVCVE-2023-20269MEDIUMCVE-2023-20269EPSS 26.6%KEVCVE-2024-20359MEDIUMCVE-2024-20359EPSS 18.8%KEVCVE-2024-20481MEDIUMCVE-2024-20481EPSS 15.9%KEVCVE-2019-1978MEDIUMCisco Firepower Threat Defense Software Stream Reassembly Bypass VulnerabilityEPSS 9.4%CVE-2025-20363CRITICALCVE-2025-20363EPSS 7.2%