CVE-2023-35841

HIGH 7.8CVE-2023-35841 · Published 14/05/2024 · updated 17/06/2026

In short

CVE-2023-35841 is a HIGH (CVSS 7.8) vulnerability affecting winflash (phoenixtech).
Chance of exploitation in the next 30 days (EPSS): 0.36%, higher than 29.7% of all vulnerabilities.
Fix: update to 4.5.0.0 or later.

Package	Affected versions	Patched versions
winflash phoenixtech	`< 4.5.0.0`	`4.5.0.0`

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.

References

blogs.vmware.com/security/2023/10/hunting-vulnerable-kernel-drivers.html · Exploit
jvn.jp/en/vu/JVNVU93886750/index.html · Third Party Advisory
phoenixtech.com/phoenix-security-notifications/cve-2023-35841 · Vendor Advisory
phoenix.com/security-notifications/cve-2023-35841 · Vendor Advisory

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