{"api_version":"1","generated_at":"2026-07-23T11:12:27+00:00","cve":"CVE-2019-1736","urls":{"html":"https://cve.report/CVE-2019-1736","api":"https://cve.report/api/cve/CVE-2019-1736.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2019-1736","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-1736"},"summary":{"title":"CVE-2019-1736","description":"A vulnerability in the firmware of the Cisco UCS C-Series Rack Servers could allow an authenticated, physical attacker to bypass Unified Extensible Firmware Interface (UEFI) Secure Boot validation checks and load a compromised software image on an affected device. The vulnerability is due to improper validation of the server firmware upgrade images. An attacker could exploit this vulnerability by installing a server firmware version that would allow the attacker to disable UEFI Secure Boot. A successful exploit could allow the attacker to bypass the signature validation checks that are done by UEFI Secure Boot technology and load a compromised software image on the affected device. 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Cisco UCS-Based Products UEFI Secure Boot Bypass Vulnerability"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Cisco Identity Services Engine Software ","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"Cisco"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"A vulnerability in the firmware of the Cisco UCS C-Series Rack Servers could allow an authenticated, physical attacker to bypass Unified Extensible Firmware Interface (UEFI) Secure Boot validation checks and load a compromised software image on an affected device. The vulnerability is due to improper validation of the server firmware upgrade images. An attacker could exploit this vulnerability by installing a server firmware version that would allow the attacker to disable UEFI Secure Boot. A successful exploit could allow the attacker to bypass the signature validation checks that are done by UEFI Secure Boot technology and load a compromised software image on the affected device. A compromised software image is any software image that has not been digitally signed by Cisco."}]},"exploit":[{"lang":"eng","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. "}],"impact":{"cvss":{"baseScore":"6.2","vectorString":"CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H ","version":"3.0"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-347"}]}]},"references":{"reference_data":[{"name":"20200219 Multiple Cisco UCS-Based Products UEFI Secure Boot Bypass Vulnerability","refsource":"CISCO","url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass"}]},"source":{"advisory":"cisco-sa-20200219-ucs-boot-bypass","defect":[["CSCvn09490","CSCvq27796","CSCvq27803"]],"discovery":"INTERNAL"}},"nvd":{"publishedDate":"2020-09-23 01:15:00","lastModifiedDate":"2020-10-23 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