How severe is CVE-2025-39203?

CVE-2025-39203 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-39203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-39203?

CVE-2025-39203 affects Hitachienergy Microscada X Sys600. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-39203?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-39203 have an EU (EUVD) identifier?

Yes. CVE-2025-39203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19002.

When was CVE-2025-39203 published?

CVE-2025-39203 was published on 2025-06-24 and last updated on 2026-06-17.

CVE-2025-39203

CVE-2025-39203 is a medium-severity vulnerability in Hitachienergy Microscada X Sys600 with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-354.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19002
Weakness: CWE-354
Affected product: Hitachienergy Microscada X Sys600
Published: 2025-06-24
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-39203?: CVE-2025-39203 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-39203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-39203?: CVE-2025-39203 affects Hitachienergy Microscada X Sys600. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-39203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-39203 have an EU (EUVD) identifier?: Yes. CVE-2025-39203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19002.
When was CVE-2025-39203 published?: CVE-2025-39203 was published on 2025-06-24 and last updated on 2026-06-17.

References

https://publisher.hitachienergy.com/preview?DocumentID=8DBD000218&LanguageCode=en&DocumentPartId=&Action=Launch

Affected products (1)

cpe:2.3:a:hitachienergy:microscada_x_sys600:*:*:*:*:*:*:*:*

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