CVE-2026-4542
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 found in SSCMS 4.7.0. The affected element is an unknown function of the file LayerImageController.Submit.cs of the component layerImage Endpoint. Such manipulation of the argument filePaths leads to path traversal. The attack may be performed from remote. The exploit has been disclosed to the public and may be used.
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 confidenceSSCMS version 4.7.0 contains a path traversal vulnerability in the LayerImageController.Submit.cs component (layerImage endpoint). The filePaths argument is not properly validated, allowing remote attackers to manipulate the path to access files outside the intended directory. This could enable unauthorized file access or disclosure of sensitive system files.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
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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Verify SSCMS installation and versionCheck for SSCMS installation directory and locate version information in version files, assembly metadata, or package manifests. Common paths include the application root directory.Affected if SSCMS version 4.7.0 is installed
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Locate LayerImageController.Submit.csSearch the SSCMS application source or bin directory for the file LayerImageController.Submit.cs or LayerImageController component.Affected if The file LayerImageController.Submit.cs exists in the application
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Check layerImage endpoint exposureIdentify if the layerImage HTTP endpoint is accessible by reviewing routing configuration, controller registration, or testing access to the endpoint URL pattern.Affected if The layerImage endpoint is exposed and reachable
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Verify filePaths parameter validationInspect the LayerImageController.Submit.cs code for validation logic on the filePaths argument. Look for allowlist filtering, canonical path resolution (Path.GetFullPath, Path.GetDirectoryName), or path traversal checks.Affected if The filePaths parameter lacks proper validation (no allowlist, no canonical path resolution, no traversal checks)
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Test for path traversal vulnerabilityIf the endpoint is accessible, attempt a controlled test request with a manipulated filePaths value referencing a file outside the expected directory (e.g., using ../ sequences).Affected if The application accepts path traversal sequences in filePaths and returns content from files outside the intended directory
A user is affected if SSCMS version 4.7.0 is installed, the layerImage endpoint is exposed, and the filePaths parameter lacks proper input validation allowing path traversal.
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 on the filePaths parameter using allowlist filtering and canonical path resolution to ensure paths resolve within the intended base directory. Additionally, enforce proper access controls and restrict file system permissions.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.
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Free · runs locallyCheck whether your project pulls in CVE-2026-4542 — 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-2026-4542 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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