CVE-2024-20363: 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%
Multiple Cisco products are affected by a vulnerability in the Snort Intrusion Prevention System (IPS) rule engine that could allow an unauthenticated, remote attacker to bypass the configured rules on an affected system. This vulnerability is due to incorrect HTTP packet handling. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured IPS rules and allow uninspected traffic onto the network.
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 SoftwareCisco · Cisco UTD SNORT IPS Engine 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%