{"cve":"CVE-2023-49721","nvd":{"published":"2024-02-14T22:15:47.530","modified":"2026-06-17T06:36:21.073","status":"Analyzed","description":"An insecure default to allow UEFI Shell in EDK2 was left enabled in LXD. This allows an OS-resident attacker to bypass Secure Boot.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":6.7},"cwes":["CWE-276"],"references":["https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137","https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139","https://nvd.nist.gov/vuln/detail/CVE-2023-48733","https://www.openwall.com/lists/oss-security/2024/02/14/4","https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137"],"products":["canonical:lxd","tianocore:edk2"],"source":"nvd","synced_at":"2026-10-19T21:45:59.823092188+00:00"},"epss":{"cve":"CVE-2023-49721","score":0.00237,"percentile":0.14796,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}