CVE-2021-22656
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 · uneditedAdvantech iView versions prior to v5.7.03.6112 are vulnerable to directory traversal, which may allow an attacker to read sensitive files.
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 confidenceAdvantech iView versions prior to 5.7.03.6112 contain a directory traversal vulnerability that allows unauthenticated attackers to access sensitive files outside the web root by manipulating path traversal sequences (e.g., ../). The CVSS 7.5 score indicates high confidentiality impact with network-exploitable attack vector.
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< 5.7.03.6112CVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/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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Confirm Advantech iView is installedCheck for iView installation by looking for the service or process running on common ports (typically port 8080 or 80), or check for installation directories such as C:\Program Files\Advantech\iView or /opt/advantech/iviewAffected if Advantech iView software is found running on the system
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Identify the installed iView versionCheck the application version through the web interface (usually in an About or Help page), check the iView.exe file properties, or look for version information in configuration files within the iView installation directoryAffected if The version number is lower than 5.7.03.6112
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Verify the web management interface is accessibleAttempt to access the iView web interface from a network location using the configured IP or hostname and portAffected if The iView web interface is reachable over the network (internal or external)
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Test for directory traversal vulnerabilityIf the web interface is accessible, attempt to request a path with traversal sequences such as GET /../../../../windows/win.ini or similar sensitive file paths outside the web rootAffected if The server returns file contents from outside the web root directory when using ../ sequences
The system is affected if Advantech iView version lower than 5.7.03.6112 is installed and its web interface is accessible, as the directory traversal flaw can be exploited without 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 data5.7.03.6112
Upgrade Advantech iView to version 5.7.03.6112 or later to remediate the directory traversal vulnerability. If immediate patching is not feasible, restrict network access to the iView management interface and implement input validation on file path parameters.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2021-22656 — 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-2021-22656 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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