CVE-2024-20351
A vulnerability in the TCP/IP traffic handling function of the Snort Detection Engine of Cisco Firepower Threat Defense (FTD) Software and Cisco FirePOWER Services could allow an unauthenticated, remote attacker to cause legitimate network traffic to be dropped, resulting in a denial of service (DoS) condition. This vulnerability is due to the improper handling of TCP/IP network traffic. An attacker could exploit this vulnerability by sending a large amount of TCP/IP network traffic through the affected device. A successful exploit could allow the attacker to cause the Cisco FTD device to drop network traffic, resulting in a DoS condition. The affected device must be rebooted to resolve the DoS condition.
Key facts
- CVSS score
- 8.6 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H- Weakness (CWE)
- CWE-400
- EPSS score
- 0.7% (53th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2024-18066)
- Published
- October 23, 2024
- NVD last modified
- August 11, 2026
- Status
- Analyzed
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2024-18066 in the EU Vulnerability Database. Last updated in EUVD on October 24, 2024.
View on the EU Vulnerability DatabaseAffected products
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
- cisco / secure firewall threat defense
and 35 more…
Certified products that may be affected
2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Cisco Secure Firewall Threat Defense (FTD) 7.4 with Secure Firewall Management Center (FMC) 7.4 and Secure Client 5.1 - Cisco Systems, Inc. - Common Criteria NSCIB-CC-2400046-01-CR - active
- Cisco Secure Firewall Threat Defense Virtual 7.4 with FMC/FMCv - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-11510-2025 - active
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-xss-yjj7ZjVq(Broken Link)
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xss-M446vbEO(Broken Link)
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sa-ftd-snort-fw-BCJTZPMu(Vendor Advisory)
- https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75300(Vendor Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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