CVE-2023-35841

WinFlash Driver Permissions Issue

7.8 High

CVE-2023-35841 is a high vulnerability (CVSS 7.8) in Phoenix Winflash Driver, published May 14, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 29th percentile. No source names a fixed version.

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.36%Up 0.3 points since May 15, 2024

What each source reports

CVE List Score used 7.8

WinFlash Driver Permissions Issue

Record: CVE-2023-35841
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-732, CWE-782
Updated: 2026-11-02

EUVDEUVD-2023-39834 7.8

Record: EUVD-2023-39834
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-qhcp-3fxf-c8vc 7.8

Exposed IOCTL with Insufficient Access Control in Phoenix WinFlash Driver on Windows allows...

Record: GHSA-qhcp-3fxf-c8vc
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-732
Updated: 2026-11-02

NVD 7.8

Record: CVE-2023-35841
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-732, CWE-782
Updated: 2026-11-02

Affected products

History

History
When	Changed	Sources
2026-11-02	created	CVE List, EUVD, GitHub Advisories, NVD