CVE-2022-50978
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 · uneditedAn unauthenticated remote attacker could potentially disrupt operations by switching between multiple configuration presets via Modbus (TCP).
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 confidenceThe vulnerability allows unauthenticated remote attackers to change configuration presets through Modbus (TCP) protocol, potentially disrupting industrial operations by manipulating device configurations without proper authentication.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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 Modbus TCP exposureScan network for open TCP port 502 (default Modbus port) using a port scanner or by examining firewall rules and network access control listsAffected if Port 502 is accessible from untrusted networks or the internet
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Verify Modbus write access controlsSend Modbus function code 0x10 (write multiple registers) or 0x06 (write single register) to the device without providing any credentials to test if configuration preset changes are acceptedAffected if The device accepts and processes write commands without requiring authentication tokens or credentials
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Inspect Modbus function permissionsReview device documentation or configuration settings to determine which Modbus function codes are permitted without authentication, specifically looking for write operations (0x06, 0x10) affecting configuration presetsAffected if Write function codes for configuration presets are permitted without any authentication mechanism
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Check network segmentation of management interfacesExamine network topology and access controls to determine if Modbus management ports are isolated from untrusted network segments or if they are directly accessibleAffected if Modbus TCP management interface is reachable from the same network segment as operational systems or untrusted networks
The environment is affected if Modbus TCP port 502 is exposed to untrusted networks and configuration preset changes can be performed without any authentication.
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 dataImplement authentication and authorization controls for Modbus operations that modify configuration presets, and consider network segmentation to limit exposure of management interfaces.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-50978 — 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-2022-50978 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
- No spam, self-promotion, credentials, or personal data