CVE-2016-7833
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 · uneditedCybozu Dezie 8.0.0 to 8.1.1 allows remote attackers to bypass access restrictions to delete an arbitrary DBM (Cybozu Dezie proprietary format) file via unspecified vectors.
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 confidenceCybozu Dezie versions 8.0.0 through 8.1.1 contain an access control bypass vulnerability that allows remote unauthenticated attackers to delete arbitrary DBM (proprietary database) files by circumventing existing access restrictions. The attack vector is not fully specified in the advisory, but the vulnerability is exploitable over the network without authentication.
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= 8.0.2= 8.0.3= 8.0.4= 8.0.5= 8.0.6= 8.0.7= 8.1.0= 8.1.1CVSS 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
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 installed Cybozu Dezie versionLocate the Dezie installation directory and check the version file or product information, typically found in the application metadata or control panel. Compare the installed version against the affected list: 8.0.2, 8.0.3, 8.0.4, 8.0.5, 8.0.6, 8.0.7, 8.1.0, 8.1.1Affected if The installed version matches any of the affected versions listed
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Verify network exposure of Dezie serviceCheck network configuration, firewall rules, or reverse proxy settings to determine if the Dezie application is accessible from untrusted networks or the public internetAffected if The Dezie application is exposed to network access from untrusted sources without additional network segmentation or access controls
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Confirm DBM file existenceLocate the DBM (proprietary database) file storage directory within the Dezie installation, typically in a data or database subdirectory. Check if any DBM files are presentAffected if DBM files exist in the Dezie data directory - these are the targets for the arbitrary deletion attack
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Check authentication configurationReview Dezie authentication settings to confirm whether the vulnerability allows unauthenticated access. Examine if the application properly enforces authentication checks on the affected endpointsAffected if The application permits unauthenticated access to endpoints that should require authentication, indicating the access control bypass is active
You are affected if your installed Cybozu Dezie version is 8.0.2, 8.0.3, 8.0.4, 8.0.5, 8.0.6, 8.0.7, 8.1.0, or 8.1.1 AND the application is network-accessible to untrusted parties AND DBM files exist in the system.
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 dataUpgrade to Cybozu Dezie version 8.1.2 or later, which contains the patch for this vulnerability. If immediate patching is not possible, restrict network access to the Dezie application to reduce attack surface.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-7833 — 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-2016-7833 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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