What is CVE-2025-39203?

CVE-2025-39203 is a medium-severity vulnerability in Hitachi Energy Microscada X Sys600, classified under Improper Validation of Integrity Check Value. CVSS score: 6.5/10. Published 2025-06-24.

How severe is CVE-2025-39203?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Hitachi Energy Microscada X Sys600

CVE-2025-39203

A vulnerability exists in the IEC 61850 of the MicroSCADA X SYS600 product. An IEC 61850-8 crafted message content from IED or remote system can cause a denial of service resulting in disconnection loop.

EPSS: 0.002 (10.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Hitachi Energy Microscada X Sys600 — versions 10.5
Hitachienergy Microscada_x_sys600

Weakness classification (CWE)

CWE-354 — Improper Validation of Integrity Check Value

References

cybersecurity@hitachienergy.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-39203?: CVE-2025-39203 is a medium-severity vulnerability in Hitachi Energy Microscada X Sys600, classified under Improper Validation of Integrity Check Value. CVSS score: 6.5/10. Published 2025-06-24.
How severe is CVE-2025-39203?: Medium severity. CVSS v3 base score is 6.5 out of 10.