What is CVE-2025-66678?

CVE-2025-66678 is a critical-severity vulnerability in Faintsnow Hardware Read \& Write Utility, classified under SQL Injection. CVSS score: 9.8/10. Published 2026-03-04.

How severe is CVE-2025-66678?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2025-66678 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SQL Injection in Faintsnow Hardware Read \& Write Utility

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 read and write operations via a crafted request.

Vulnerability class: SQL Injection

Published 2026-03-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Faintsnow Hardware Read \& Write Utility

Weakness classification (CWE)

CWE-89 — SQL Injection

Public proof-of-concept exploits

cwjchoi01/CVE-2025-66678

References

github.com/Faintsnow/HE (Broken Link)
github.com/cwjchoi01/CVE-2025-66678 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-66678?: CVE-2025-66678 is a critical-severity vulnerability in Faintsnow Hardware Read \& Write Utility, classified under SQL Injection. CVSS score: 9.8/10. Published 2026-03-04.
How severe is CVE-2025-66678?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2025-66678 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.