CVE-2022-34836
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 · uneditedRelative Path Traversal vulnerability in ABB Zenon 8.20 allows the user to access files on the Zenon system and user also can add own log messages and e.g., flood the log entries. An attacker who successfully exploit the vulnerability could access the Zenon runtime activities such as the start and stop of various activity and the last error code etc.
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 confidenceRelative Path Traversal vulnerability in ABB Zenon 8.20 allows unauthenticated or authenticated users to access arbitrary files on the Zenon system and manipulate log entries, potentially exposing runtime activity information such as process start/stop events and error codes.
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<= 8.20CVSS 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
- High
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/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 ABB Zenon installationCheck for Zenon processes running (zenon.exe, zenonsv.exe) or look for the Zenon installation directory (typically C:\Program Files\ABB\Zenon or C:\inetpub\wwwroot\zenonweb)Affected if ABB Zenon software is installed on the system
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Determine Zenon versionCheck the Zenon version by viewing file properties of zenon.exe or checking the registry key HKLM\SOFTWARE\ABB\Zenon\VersionAffected if The installed version is 8.20 or any version lower than 8.20 (the vulnerability affects versions <= 8.20)
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Verify if Zenon web interface is enabledCheck if the Zenon web server (zenonweb) is installed and running - look for IIS site or standalone web service configuration for ZenonAffected if The Zenon web interface component is enabled and accessible (the path traversal vulnerability targets the web interface)
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Check network exposure of web serviceReview firewall rules and IIS/site bindings to determine if the Zenon web service is exposed to network accessAffected if The Zenon web service is reachable from network or untrusted segments (vulnerability can be exploited by unauthenticated or authenticated users)
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Inspect access controls on log directoryVerify file system permissions on the Zenon log directory (typically in the Zenon installation folder under \log or \archive) to see if arbitrary file access would be possibleAffected if The web service account has permissions beyond the intended log directory, allowing traversal
The environment is affected if ABB Zenon version 8.20 or lower is installed with the web interface enabled and network-accessible, allowing an attacker to use relative path traversal to access arbitrary files.
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 dataApply vendor patches for ABB Zenon 8.20; implement strict input validation on file path parameters and enforce least-privilege access controls to prevent unauthorized file system access.
- Consultation8.0 h
- Implementation12.0 h
- Testing10.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $10,144.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-34836 — 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-2022-34836 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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