CVE-2025-39205
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA vulnerability exists in the IEC 61850 in MicroSCADA X SYS600 product. The certificate validation of the TLS protocol allows remote Man-in-the-Middle attack due to missing proper validation.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe IEC 61850 protocol implementation in ABB MicroSCADA X SYS600 fails to properly validate TLS certificates, allowing remote attackers to intercept encrypted communications via Man-in-the-Middle attacks. This stems from missing or insufficient certificate chain, hostname, and validity verification during TLS handshakes.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 10.3, < 10.7CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the installed version of Hitachienergy MicroSCADA X SYS600Open the MicroSCADA application and navigate to Help > About, or check the Windows Programs and Features list to locate the installed version numberAffected if The version is 10.3 or higher but lower than 10.7
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Determine if the IEC 61850 protocol is configured and activeAccess the MicroSCADA system configuration or project settings and review the enabled communication protocols. Look for IEC 61850 MMS or IEC 61850 GOOSE configurations in the protocol settingsAffected if IEC 61850 protocol is enabled and configured for communications
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Inspect the TLS settings for the IEC 61850 connectionLocate the IEC 61850 protocol configuration panel within MicroSCADA and examine the security/TLS settings. Check whether certificate validation options (chain verification, hostname verification, validity period checking) are present and enabledAffected if Certificate validation is disabled, missing, or set to bypass verification for IEC 61850 TLS connections
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Review the configuration files for TLS certificate validation settingsSearch the MicroSCADA configuration directory for files related to IEC 61850 or TLS settings. Look for parameters such as VerifyCertificates, ValidateChain, CheckHostname, or similar flags that control certificate validation behaviorAffected if Configuration files contain settings that disable or bypass certificate chain, hostname, or validity checks
You are affected if you are running version 10.3 through 10.6.x with IEC 61850 protocol enabled and TLS certificate validation disabled or not properly configured.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped10.7
Implement proper TLS certificate validation including chain-of-trust verification, hostname checking, and expiration validation. For legacy systems, consider network segmentation and VPN tunnels as compensating controls until full remediation.
10.7
- Upgrade MicroSCADA X SYS600 to version 10.7 or later to obtain the fixed TLS certificate validation implementation
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-39205 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-39205 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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