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Fencer Vulns
medium 6.5

CVE-2025-39203 json

A vulnerability exists in the IEC 61850 of the MicroSCADA X SYS600 product.

published 2025-06-24 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-19002

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

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.

Patch / fix

  • hitachienergy microscada_x_sys600 10.7

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-259-02 updated cvss 4.3

Hitachi Energy RTU500 Series

  • Hitachi Energy RTU500 series CMU Firmware vers:RTU500_series_CMU_Firmware/>=12.7.1, <=12.7.7, vers:RTU500_series_CMU_Firmware/>=13.4.1, <=13.4.4, vers:RTU500_series_CMU_Firmware/>=13.5.1, <=13.5.3, 13.6.1
    affected: vendor fix, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-289-11 updated cvss 6.5

Hitachi Energy MACH GWS

  • Hitachi Energy MACH GWS >= 3.0.0.0, <= 3.4.0.0
    affected: fixed in 3.5, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-184-02 updated cvss 6.5

Hitachi Energy MicroSCADA X SYS600

  • Hitachi Energy MicroSCADA Pro/X SYS600 >=10.5, <10.6
    affected: vendor fix, mitigation “Hitachi Energy has identified the following specific workarounds and mitigations users can apply to reduce risk:” publisher.hitachienergy.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
16 mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Hitachi Energy MicroSCADA X SYS600

Classification

Weakness
  • CWE-354 Improper Validation of Integrity Check Value

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.