CVE-2018-11551
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 · uneditedAXON PBX 2.02 contains a DLL hijacking vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system. The vulnerability exists because a DLL file is loaded by 'pbxsetup.exe' improperly.
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 confidenceAXON PBX 2.02 contains a DLL hijacking vulnerability in pbxsetup.exe where the application improperly loads a DLL file, allowing an unauthenticated remote attacker to execute arbitrary code by placing a malicious DLL in a location where the application searches for DLLs.
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= 2.02CVSS 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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 Axon PBX installationCheck for Nch Axon Pbx installation directory (typically in Program Files or Program Files (x86)) and locate pbxsetup.exeAffected if pbxsetup.exe exists in the installation directory and version is 2.02
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Verify installed versionRight-click pbxsetup.exe, select Properties, then look at the Details tab for File Version; or right-click the application in Start menu, select PropertiesAffected if File version shows 2.02
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Check DLL search path exposureExamine the directory containing pbxsetup.exe and directories in the system PATH for writeable locations where a malicious DLL could be placedAffected if The directory containing pbxsetup.exe or any directory in the DLL search path is writable by standard users
A system is affected if Nch Axon Pbx version 2.02 is installed with pbxsetup.exe present and the application directory or DLL search path locations are writable.
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 dataReplace the vulnerable pbxsetup.exe with an updated version that implements secure DLL loading practices (e.g., explicit DLL loading with full paths, safe DLL search mode enabled, or bundling required DLLs). If no patch is available, restrict write access to directories in the application's DLL search path.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-11551 — 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-2018-11551 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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