{"id":"CVE-2023-35841","aliases":["EUVD-2023-39834","GHSA-qhcp-3fxf-c8vc"],"status":"published","title":"WinFlash Driver Permissions Issue","description":"Exposed IOCTL with Insufficient Access Control in Phoenix WinFlash Driver on Windows allows Privilege Escalation which allows for modification of system firmware.This issue affects WinFlash Driver: before 4.5.0.0.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00358,"percentile":0.2993,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-732","CWE-782"],"published":"2024-05-14T14:56:14Z","modified":"2026-06-17T06:05:18Z","products":[{"vendor":"phoenix","product":"winflash driver"},{"vendor":"phoenix","product":"winflash_driver"},{"vendor":"phoenixtech","product":"winflash"}],"references":[{"url":"https://phoenixtech.com/phoenix-security-notifications/cve-2023-35841/","tags":["Vendor Advisory"]},{"url":"https://blogs.vmware.com/security/2023/10/hunting-vulnerable-kernel-drivers.html","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"https://jvn.jp/en/vu/JVNVU93886750/index.html","tags":["x_transferred","Third Party Advisory"]},{"url":"https://www.phoenix.com/security-notifications/cve-2023-35841/","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-35841"},{"url":"https://www.phoenix.com/security-notifications/cve-2023-35841"},{"url":"https://phoenixtech.com/phoenix-security-notifications/cve-2023-35841"},{"url":"https://github.com/advisories/GHSA-qhcp-3fxf-c8vc"}],"sources":{"cve":[{"id":"CVE-2023-35841","title":"WinFlash Driver Permissions Issue","description":"Exposed IOCTL with Insufficient Access Control in Phoenix WinFlash Driver on Windows allows Privilege Escalation which allows for modification of system firmware.This issue affects WinFlash Driver: before 4.5.0.0.","status":"published","published":"2024-05-14T14:56:14.743Z","modified":"2025-07-28T20:49:33.663Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-732","CWE-782"],"updated_at":"2026-11-02T14:35:33.794347Z"}],"euvd":[{"id":"EUVD-2023-39834","description":"Exposed IOCTL with Insufficient Access Control in Phoenix WinFlash Driver on Windows allows Privilege Escalation which allows for modification of system firmware.This issue affects WinFlash Driver: before 4.5.0.0.","status":"published","published":"2024-05-14T14:56:14Z","modified":"2025-07-28T20:49:33Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:32:03.359865Z"}],"ghsa":[{"id":"GHSA-qhcp-3fxf-c8vc","title":"Exposed IOCTL with Insufficient Access Control in Phoenix WinFlash Driver on Windows allows...","description":"Exposed IOCTL with Insufficient Access Control in Phoenix WinFlash Driver on Windows allows Privilege Escalation which allows for modification of system firmware.This issue affects WinFlash Driver: before 4.5.0.0.","status":"published","published":"2024-05-14T18:30:58Z","modified":"2025-07-28T21:32:33Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-732"],"updated_at":"2026-11-02T15:03:07.9296Z"}],"nvd":[{"id":"CVE-2023-35841","description":"Exposed IOCTL with Insufficient Access Control in Phoenix WinFlash Driver on Windows allows Privilege Escalation which allows for modification of system firmware.This issue affects WinFlash Driver: before 4.5.0.0.","status":"published","published":"2024-05-14T16:15:36.953Z","modified":"2026-06-17T06:05:18.763Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-732","CWE-782"],"updated_at":"2026-11-02T14:09:15.329996Z"}]}}