{"id":"CVE-2026-76420","title":"A vulnerability in the internal configuration of the Apache JServ Protocol (AJP) connector for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to impersonate a peer device.\r\n\r\nThis vulnerability is due to i…","summary":"A vulnerability in the internal configuration of the Apache JServ Protocol (AJP) connector for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to impersonate a peer device.\r\n\r\nThis vulnerability is due to i…","severity":"critical","cvss":9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-285"],"vendor":"Cisco","product":"Cisco Secure Firewall Management Center (FMC)","affected":["secure_firewall_management_center_fmc 7.0.0","secure_firewall_management_center_fmc 7.0.0.1","secure_firewall_management_center_fmc 7.0.1","secure_firewall_management_center_fmc 7.0.1.1","secure_firewall_management_center_fmc 7.0.2","secure_firewall_management_center_fmc 7.2.0","secure_firewall_management_center_fmc 7.0.2.1","secure_firewall_management_center_fmc 7.0.3","secure_firewall_management_center_fmc 7.2.0.1","secure_firewall_management_center_fmc 7.0.4","secure_firewall_management_center_fmc 7.2.1","secure_firewall_management_center_fmc 7.0.5","secure_firewall_management_center_fmc 7.3.0","secure_firewall_management_center_fmc 7.2.2","secure_firewall_management_center_fmc 7.3.1","secure_firewall_management_center_fmc 7.2.3","secure_firewall_management_center_fmc 7.2.3.1","secure_firewall_management_center_fmc 7.2.4","secure_firewall_management_center_fmc 7.0.6","secure_firewall_management_center_fmc 7.2.4.1","secure_firewall_management_center_fmc 7.2.5","secure_firewall_management_center_fmc 7.3.1.1","secure_firewall_management_center_fmc 7.4.0","secure_firewall_management_center_fmc 7.0.6.1","secure_firewall_management_center_fmc 7.2.5.1","secure_firewall_management_center_fmc 7.4.1","secure_firewall_management_center_fmc 7.2.6","secure_firewall_management_center_fmc 7.4.1.1","secure_firewall_management_center_fmc 7.0.6.2","secure_firewall_management_center_fmc 7.2.7","secure_firewall_management_center_fmc 7.2.5.2","secure_firewall_management_center_fmc 7.3.1.2","secure_firewall_management_center_fmc 7.2.8","secure_firewall_management_center_fmc 7.6.0","secure_firewall_management_center_fmc 7.4.2","secure_firewall_management_center_fmc 7.2.8.1","secure_firewall_management_center_fmc 7.0.6.3","secure_firewall_management_center_fmc 7.4.2.1","secure_firewall_management_center_fmc 7.2.9","secure_firewall_management_center_fmc 7.0.7","secure_firewall_management_center_fmc 7.7.0","secure_firewall_management_center_fmc 7.4.2.2","secure_firewall_management_center_fmc 7.2.10","secure_firewall_management_center_fmc 7.6.1","secure_firewall_management_center_fmc 7.4.2.3","secure_firewall_management_center_fmc 7.0.8","secure_firewall_management_center_fmc 7.6.2","secure_firewall_management_center_fmc 7.7.10","secure_firewall_management_center_fmc 7.2.10.1","secure_firewall_management_center_fmc 7.0.8.1"],"published":"2026-09-16","updated":"2026-09-17","sourceUpdated":"2026-09-17T12:18:26.450","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76420","references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc2-multivulns-HXgcqRG","label":"psirt@cisco.com"},{"url":"https://software.cisco.com"}],"tags":["nvd","cve.org","csaf","vendor-advisory","cisco"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-17T03:57:15.366414Z"},"ingestedAt":"2026-09-16T16:37:52.189Z","epss":0.00367,"epssPercentile":0.30419,"slug":"CVE-2026-76420","body":"## Overview\n\nA vulnerability in the internal configuration of the Apache JServ Protocol (AJP) connector for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to impersonate a peer device.\r\n\r\nThis vulnerability is due to incorrect initialization of encryption parameters for the AJP connector at boot time. An attacker could exploit this vulnerability by sending crafted packets to the AJP connector. A successful exploit could allow the attacker to execute commands as root and gain full control over the FMC REST APIs on the affected device.\r\nNote: This vulnerability can be exploited only if the valid sftunnel connection between Cisco Secure FMC Software and Cisco Secure FTD Software is down.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **cisco-sa-fmc2-multivulns-HXgcqRG** · Cisco · affected: Cisco Secure Firewall Management Center (FMC) Appliances · updated 2026-09-16 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc2-multivulns-HXgcqRG)","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":49.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}