CVE-2022-39033
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 · uneditedSmart eVision’s file acquisition function has a path traversal vulnerability due to insufficient filtering for special characters in the URL parameter. An unauthenticated remote attacker can exploit this vulnerability to bypass authentication, access restricted paths to download and delete arbitrary system files to disrupt service.
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 confidenceSmart eVision's file acquisition function contains a path traversal vulnerability where insufficient filtering of special characters in URL parameters allows unauthenticated attackers to use directory traversal sequences (e.g., ../) to escape the intended directory and access or delete arbitrary files on the system, also bypassing authentication mechanisms.
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= 2022.02.21CVSS 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
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 the Smart eVision versionLocate and read the version information for your Lcnet Smart Evision installation. This is typically found in the software's About section, an installation manifest, or by querying the application's version endpoint if available.Affected if The installed version is exactly 2022.02.21. Versions different from this exact release are not affected by this specific CVE.
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Confirm the web interface is accessibleDetermine if the Smart eVision web interface or file acquisition function is network-accessible. Check firewall rules, network configurations, and exposed IP addresses or hostnames.Affected if The file acquisition function is exposed to network access without proper network segmentation or authentication barriers.
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Check for input validation or filteringInspect any web application firewall (WAF), reverse proxy, or application-level configuration that handles URL parameter validation. Look for rules or logic that filter or block directory traversal sequences like ../ or ..\.Affected if No input validation or traversal sequence filtering is configured, or the existing filters can be bypassed.
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Review authentication enforcement on file operationsExamine the application's configuration and access control settings to verify that the file acquisition function requires proper authentication. Check if unauthenticated requests are permitted to file-related endpoints.Affected if The file acquisition endpoint can be accessed or manipulated without authentication, or authentication can be bypassed.
You are affected if your Lcnet Smart Evision is version 2022.02.21 AND the file acquisition function is accessible without proper authentication and input validation.
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 strict input validation and sanitization for URL parameters, restrict file access to allowed directories using allowlist validation, ensure authentication checks are properly enforced on all file operations, and deploy web application firewall rules to detect and block traversal patterns.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-39033 — 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-2022-39033 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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- 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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