CVE-2019-6578
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 has been identified in SINAMICS PERFECT HARMONY GH180 with NXG I control, MLFBs: 6SR2...-, 6SR3...-, 6SR4...- (All Versions with option G28), SINAMICS PERFECT HARMONY GH180 with NXG II control, MLFBs: 6SR2...-, 6SR3...-, 6SR4...- (All Versions with option G28). A denial of service vulnerability exists in the affected products. The vulnerability could be exploited by an attacker with network access to the device. Successful exploitation requires no privileges and no user interaction. An attacker could use the vulnerability to compromise availability of the affected system. At the time of advisory publication no public exploitation of this security vulnerability was known.
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 · moderate confidenceA denial of service vulnerability exists in SINAMICS PERFECT HARMONY GH180 variable frequency drives (with NXG I/II control, option G28). An unauthenticated attacker with network access can exploit this vulnerability to crash the device, compromising system availability.
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 dataall versionsall versionsall versionsall versionsall versionsall versionsCVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 GH180 variable frequency drives in your inventoryReview asset inventory, PLC programs, or network scans for Sinamics Perfect Harmony GH180 devices. Check nameplates, Siemens MLFB ordering numbers, or management interfaces for model identification.Affected if The environment contains any Sinamics Perfect Harmony GH180 variable frequency drives.
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Confirm NXG I or NXG II control typeCheck device nameplate, Siemens configuration software (e.g., Startdrive, S7), or management interface for control unit type - look for 'NXG I Control' or 'NXG II Control' designation.Affected if The drive uses NXG I or NXG II control unit.
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Verify MLFB firmware numberCheck device firmware version, Siemens engineering tools, or web interface for MLFB ending in 6sr2, 6sr3, or 6sr4.Affected if The MLFB firmware identifier ends with 6sr2, 6sr3, or 6sr4.
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Check for option G28Review device configuration, option list, or nameplate data for presence of option code G28.Affected if Option G28 is installed on the drive.
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Assess network accessibilityReview firewall rules, network segmentation, and access lists to determine if the drive is reachable from untrusted networks or directly exposed to IP-based access.Affected if The drive is accessible from network segments beyond the isolated industrial control network.
If you have any Sinamics Perfect Harmony GH180 drives with NXG I/II control, MLFB 6sr2-6sr4, and option G28 that are network-accessible, your environment is affected by this CVE.
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.
From vendor dataIsolate affected devices behind network firewalls or air-gap industrial networks; apply vendor patches when available; monitor for unusual network traffic patterns targeting the affected VFDs.
- Consultation8.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-6578 — 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-2019-6578 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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