CVE-2025-66678
An issue in the HwRwDrv.sys component of Nil Hardware Editor Hardware Read & Write Utility v1.25.11.26 and earlier allows attackers to execute arbitrary...
- Published
- Mar 4, 2026
- Updated
- Mar 5, 2026
- Assigning CNA
- mitre
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 49.0%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
An issue in the HwRwDrv.sys component of Nil Hardware Editor Hardware Read & Write Utility v1.25.11.26 and earlier allows attackers to execute arbitrary read and write operations via a crafted request.
Sources
1Proof-of-concept exploit for CVE-2025-66678 demonstrating arbitrary MSR and physical memory read/write via a vulnerable hardware utility driver to achieve kernel-mode privilege escalation to SYSTEM.
Responsible use
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