What is CVE-2015-7917?

CVE-2015-7917 is a high-severity vulnerability in Opcsystems Opc Systems.net. CVSS score: 7.2/10. Published 2015-12-23.

How severe is CVE-2015-7917?

High severity. CVSS v3 base score is 7.2 out of 10.

Vulnerability in Opcsystems Opc Systems.net

CVE-2015-7917

Untrusted search path vulnerability in Open Automation OPC Systems.NET 8.00.0023 and earlier allows local users to gain privileges via a Trojan horse DLL in an unspecified directory.

Published 2015-12-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (30.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Opcsystems Opc Systems.net

References

www.securityfocus.com/bid/78909 (vdb-entry)
ics-cert.us-cert.gov/advisories/ICSA-15-344-02 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2015-7917?: CVE-2015-7917 is a high-severity vulnerability in Opcsystems Opc Systems.net. CVSS score: 7.2/10. Published 2015-12-23.
How severe is CVE-2015-7917?: High severity. CVSS v3 base score is 7.2 out of 10.