{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20154","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2025-10-08T11:59:15.386Z","datePublished":"2026-09-16T20:13:40.103Z","dateUpdated":"2026-09-18T19:09:05.715Z"},"containers":{"cna":{"title":"Cisco Secure Firewall Adaptive Security Appliance Software and Secure Firewall Threat Defense Software Logging Denial of Service","metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"descriptions":[{"lang":"en","value":"A vulnerability in the system rate-limiting process for syslog message 419002 of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause high CPU utilization on an affected device, resulting in a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to improper rate limiting for syslog message 419002. An attacker could exploit this vulnerability by sending a flood of TCP synchronization (SYN) packets to an affected device. A successful exploit could allow the attacker to cause high CPU utilization, resulting in performance degradation. "}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-logging-dos-ZXXNesfN","name":"cisco-sa-asa-ftd-logging-dos-ZXXNesfN"}],"exploits":[{"lang":"en","value":"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}],"source":{"advisory":"cisco-sa-asa-ftd-logging-dos-ZXXNesfN","discovery":"EXTERNAL","defects":["CSCwq97424"]},"problemTypes":[{"descriptions":[{"lang":"en","description":"Loop with Unreachable Exit Condition ('Infinite Loop')","type":"cwe","cweId":"CWE-835"}]}],"affected":[{"vendor":"Cisco","product":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software","versions":[{"version":"9.16.1","status":"affected"},{"version":"9.16.1.28","status":"affected"},{"version":"9.16.2","status":"affected"},{"version":"9.16.2.3","status":"affected"},{"version":"9.16.2.7","status":"affected"},{"version":"9.16.2.11","status":"affected"},{"version":"9.16.2.13","status":"affected"},{"version":"9.16.2.14","status":"affected"},{"version":"9.16.3.3","status":"affected"},{"version":"9.16.3","status":"affected"},{"version":"9.16.3.14","status":"affected"},{"version":"9.18.1","status":"affected"},{"version":"9.16.3.15","status":"affected"},{"version":"9.18.1.3","status":"affected"},{"version":"9.18.2","status":"affected"},{"version":"9.16.3.19","status":"affected"},{"version":"9.16.3.23","status":"affected"},{"version":"9.18.2.5","status":"affected"},{"version":"9.16.4","status":"affected"},{"version":"9.18.2.7","status":"affected"},{"version":"9.19.1","status":"affected"},{"version":"9.16.4.9","status":"affected"},{"version":"9.18.2.8","status":"affected"},{"version":"9.16.4.14","status":"affected"},{"version":"9.18.3","status":"affected"},{"version":"9.19.1.5","status":"affected"},{"version":"9.16.4.18","status":"affected"},{"version":"9.19.1.9","status":"affected"},{"version":"9.18.3.39","status":"affected"},{"version":"9.16.4.19","status":"affected"},{"version":"9.19.1.12","status":"affected"},{"version":"9.18.3.46","status":"affected"},{"version":"9.16.4.27","status":"affected"},{"version":"9.19.1.18","status":"affected"},{"version":"9.18.3.53","status":"affected"},{"version":"9.18.3.55","status":"affected"},{"version":"9.16.4.38","status":"affected"},{"version":"9.16.4.39","status":"affected"},{"version":"9.18.3.56","status":"affected"},{"version":"9.20.1","status":"affected"},{"version":"9.16.4.42","status":"affected"},{"version":"9.19.1.22","status":"affected"},{"version":"9.18.4","status":"affected"},{"version":"9.20.1.5","status":"affected"},{"version":"9.18.4.5","status":"affected"},{"version":"9.19.1.24","status":"affected"},{"version":"9.16.4.48","status":"affected"},{"version":"9.18.4.8","status":"affected"},{"version":"9.20.2","status":"affected"},{"version":"9.19.1.27","status":"affected"},{"version":"9.16.4.55","status":"affected"},{"version":"9.18.4.22","status":"affected"},{"version":"9.20.2.10","status":"affected"},{"version":"9.16.4.57","status":"affected"},{"version":"9.19.1.28","status":"affected"},{"version":"9.18.4.24","status":"affected"},{"version":"9.20.2.21","status":"affected"},{"version":"9.16.4.61","status":"affected"},{"version":"9.19.1.31","status":"affected"},{"version":"9.18.4.29","status":"affected"},{"version":"9.20.2.22","status":"affected"},{"version":"9.16.4.62","status":"affected"},{"version":"9.18.4.34","status":"affected"},{"version":"9.20.3","status":"affected"},{"version":"9.16.4.67","status":"affected"},{"version":"9.16.4.70","status":"affected"},{"version":"9.18.4.40","status":"affected"},{"version":"9.23.1","status":"affected"},{"version":"9.22.1.1","status":"affected"},{"version":"9.16.4.71","status":"affected"},{"version":"9.20.3.4","status":"affected"},{"version":"9.18.4.47","status":"affected"},{"version":"9.20.3.7","status":"affected"},{"version":"9.19.1.37","status":"affected"},{"version":"9.16.4.76","status":"affected"},{"version":"9.20.3.9","status":"affected"},{"version":"9.19.1.38","status":"affected"},{"version":"9.18.4.50","status":"affected"},{"version":"9.22.1.3","status":"affected"},{"version":"9.20.3.10","status":"affected"},{"version":"9.22.1.2","status":"affected"},{"version":"9.18.4.52","status":"affected"},{"version":"9.20.3.13","status":"affected"},{"version":"9.22.1.6","status":"affected"},{"version":"9.18.4.53","status":"affected"},{"version":"9.16.4.82","status":"affected"},{"version":"9.22.2","status":"affected"},{"version":"9.20.3.16","status":"affected"},{"version":"9.19.1.42","status":"affected"},{"version":"9.18.4.57","status":"affected"},{"version":"9.16.4.84","status":"affected"},{"version":"9.23.1.3","status":"affected"},{"version":"9.20.3.20","status":"affected"},{"version":"9.22.2.4","status":"affected"},{"version":"9.23.1.7","status":"affected"},{"version":"9.20.4","status":"affected"},{"version":"9.22.2.9","status":"affected"},{"version":"9.23.1.13","status":"affected"},{"version":"9.20.4.7","status":"affected"},{"version":"9.22.2.13","status":"affected"},{"version":"9.18.4.66","status":"affected"},{"version":"9.20.4.10","status":"affected"},{"version":"9.23.1.19","status":"affected"},{"version":"9.16.4.85","status":"affected"},{"version":"9.22.2.14","status":"affected"},{"version":"9.18.4.67","status":"affected"},{"version":"9.18.4.68","status":"affected"},{"version":"9.23.1.22","status":"affected"},{"version":"9.20.4.14","status":"affected"},{"version":"9.22.2.20","status":"affected"}],"defaultStatus":"unknown"},{"vendor":"Cisco","product":"Cisco Secure Firewall Threat Defense (FTD) Software","versions":[{"version":"7.0.0","status":"affected"},{"version":"7.0.0.1","status":"affected"},{"version":"7.0.1","status":"affected"},{"version":"7.0.1.1","status":"affected"},{"version":"7.0.2","status":"affected"},{"version":"7.2.0","status":"affected"},{"version":"7.0.2.1","status":"affected"},{"version":"7.0.3","status":"affected"},{"version":"7.2.0.1","status":"affected"},{"version":"7.0.4","status":"affected"},{"version":"7.2.1","status":"affected"},{"version":"7.0.5","status":"affected"},{"version":"7.3.0","status":"affected"},{"version":"7.2.2","status":"affected"},{"version":"7.2.3","status":"affected"},{"version":"7.3.1","status":"affected"},{"version":"7.2.4","status":"affected"},{"version":"7.0.6","status":"affected"},{"version":"7.2.5","status":"affected"},{"version":"7.2.4.1","status":"affected"},{"version":"7.3.1.1","status":"affected"},{"version":"7.4.0","status":"affected"},{"version":"7.0.6.1","status":"affected"},{"version":"7.2.5.1","status":"affected"},{"version":"7.4.1","status":"affected"},{"version":"7.2.6","status":"affected"},{"version":"7.0.6.2","status":"affected"},{"version":"7.4.1.1","status":"affected"},{"version":"7.2.7","status":"affected"},{"version":"7.2.5.2","status":"affected"},{"version":"7.3.1.2","status":"affected"},{"version":"7.2.8","status":"affected"},{"version":"7.6.0","status":"affected"},{"version":"7.4.2","status":"affected"},{"version":"7.2.8.1","status":"affected"},{"version":"7.0.6.3","status":"affected"},{"version":"7.4.2.1","status":"affected"},{"version":"7.2.9","status":"affected"},{"version":"7.0.7","status":"affected"},{"version":"7.7.0","status":"affected"},{"version":"7.4.2.2","status":"affected"},{"version":"7.2.10","status":"affected"},{"version":"7.6.1","status":"affected"},{"version":"7.4.2.3","status":"affected"},{"version":"7.0.8","status":"affected"},{"version":"7.6.2","status":"affected"},{"version":"7.7.10","status":"affected"},{"version":"7.7.11","status":"affected"},{"version":"7.0.8.1","status":"affected"},{"version":"7.6.2.1","status":"affected"},{"version":"7.7.10.1","status":"affected"},{"version":"7.4.2.4","status":"affected"},{"version":"7.2.10.2","status":"affected"},{"version":"7.4.3","status":"affected"},{"version":"7.6.4","status":"affected"},{"version":"7.4.4","status":"affected"}],"defaultStatus":"unknown"}],"providerMetadata":{"orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco","dateUpdated":"2026-09-18T19:09:05.715Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-18T14:39:37.915604Z","id":"CVE-2026-20154","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-18T14:46:19.549Z"}}]}}