{"id":"CVE-2023-49721","aliases":["EUVD-2023-53649","GHSA-4639-7gfm-29p2","OESA-2026-4033","OESA-2026-4217"],"status":"published","title":"An insecure default to allow UEFI Shell in EDK2 was left enabled in LXD. This allows an OS...","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.","severity":{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00237,"percentile":0.14889,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-276"],"published":"2024-02-14T21:57:40Z","modified":"2026-10-28T02:31:14Z","fixes":[{"ecosystem":"openEuler:24.03-LTS-SP3","package":"edk2","fixed_in":["202308-49.oe2403sp3"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP4","package":"edk2","fixed_in":["202308-53.oe2403sp4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"202308-49.oe2403sp3"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP4","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"202308-53.oe2403sp4"}]}]}],"products":[{"vendor":"canonical","product":"lxd"},{"vendor":"canonical ltd.","product":"lxd"},{"vendor":"tianocore","product":"edk2"}],"references":[{"url":"https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139","tags":["issue-tracking","x_transferred","Issue Tracking","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-48733","tags":["issue-tracking","x_transferred","Third Party Advisory","report"]},{"url":"https://www.openwall.com/lists/oss-security/2024/02/14/4","tags":["mailing-list","x_transferred","Mailing List","article"]},{"url":"https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137","tags":["issue-tracking","x_transferred","Issue Tracking","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-49721","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4639-7gfm-29p2"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49721.json","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4033","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4217","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-49721","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.","status":"published","published":"2024-02-14T21:57:40.878Z","modified":"2024-10-24T16:44:29.65Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:35:13.368958Z"}],"euvd":[{"id":"EUVD-2023-53649","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.","status":"published","published":"2024-02-14T21:57:40Z","modified":"2024-10-24T16:44:29Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-03T00:05:20.137911Z"}],"ghsa":[{"id":"GHSA-4639-7gfm-29p2","title":"An insecure default to allow UEFI Shell in EDK2 was left enabled in LXD. This allows an OS...","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.","status":"published","published":"2024-02-15T00:30:30Z","modified":"2024-10-24T18:30:41Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:58:35.380011Z"}],"nvd":[{"id":"CVE-2023-49721","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.","status":"published","published":"2024-02-14T22:15:47.53Z","modified":"2026-06-17T06:36:21.073Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:09:07.077422Z"}],"osv":[{"id":"CVE-2023-49721","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.","status":"published","published":"2024-02-14T21:57:40.878Z","modified":"2026-10-28T02:31:14.534521998Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:34.72355Z"},{"id":"OESA-2026-4033","title":"edk2 security update","description":"EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications.\r\n\r\nSecurity Fix(es):\n\nAn insecure default to allow UEFI Shell in EDK2 was left enabled in LXD. This allows an OS-resident attacker to bypass Secure Boot.(CVE-2023-49721)","status":"published","published":"2026-09-25T01:27:30Z","modified":"2026-09-25T01:45:07.351030722Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"OESA-2026-4217","title":"edk2 security update","description":"EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications.\r\n\r\nSecurity Fix(es):\n\nAn insecure default to allow UEFI Shell in EDK2 was left enabled in LXD. This allows an OS-resident attacker to bypass Secure Boot.(CVE-2023-49721)","status":"published","published":"2026-09-30T13:47:42Z","modified":"2026-10-01T02:00:09.674527308Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:47.643553Z"}]}}