What is CVE-2023-34391?

CVE-2023-34391 is a high-severity vulnerability in Microsoft Windows, classified under Insecure Inherited Permissions. CVSS score: 7.4/10. Published 2023-08-31.

How severe is CVE-2023-34391?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Microsoft Windows

CVE-2023-34391

Insecure Inherited Permissions vulnerability in Schweitzer Engineering Laboratories SEL-5033 AcSELerator RTAC Software on Windows allows Leveraging/Manipulating Configuration File Search Paths. See Instruction Manual Appendix A [Cybersecurity] tag dated 20230522 for more details. This issue affects SEL-5033 AcSELerator RTAC Software: before 1.35.151.21000.

Published 2023-08-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.001 (2.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Weakness classification (CWE)

References

selinc.com/support/security-notifications/external-reports/ (Vendor Advisory)
dragos.com (Not Applicable)

Frequently asked questions

What is CVE-2023-34391?: CVE-2023-34391 is a high-severity vulnerability in Microsoft Windows, classified under Insecure Inherited Permissions. CVSS score: 7.4/10. Published 2023-08-31.
How severe is CVE-2023-34391?: High severity. CVSS v3 base score is 7.4 out of 10.