CVE-2018-16496
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 · uneditedIn Versa Director, the un-authentication request found.
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 confidenceVersa Director versions prior to the fix contained an authentication bypass vulnerability that allowed unauthenticated access to certain resources or endpoints. The specific nature of the bypass (e.g., missing authentication check, direct object reference, or credential handling issue) is not detailed in available references, but the CVSS 5.3 rating suggests moderate impact with likely network-level exploitation.
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 dataall versionsCVSS 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
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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.
-
Confirm Versa Director is deployedInventory your environment for Versa Networks Versa Director installations. Check for any systems running the Versa Director management platform, typically on port 8443 or 443 for the web interface.Affected if Versa Director is found running in the environment, as all versions are affected by this vulnerability.
-
Determine installed versionAccess the Versa Director admin interface or check the system via command line (e.g., rpm package list or application about page) to identify the exact version number.Affected if Any version found is affected, as the vulnerability applies to all versions prior to the fix.
-
Assess network exposure of management interfaceReview firewall rules, access control lists, and network segmentation to determine if the Versa Director management interface (ports 443, 8443, or as configured) is accessible from untrusted networks or the public internet.Affected if The management interface is reachable from untrusted network segments or the internet, enabling network-level exploitation.
-
Check for unauthorized administrative accountsLog into Versa Director and review the Administrator accounts list under the administration or user management section. Look for any unexpected or unknown admin-level accounts.Affected if Unknown or unauthorized administrator accounts exist, suggesting potential exploitation or post-breach activity.
-
Review access logs for anomalous activityExamine Versa Director authentication and access logs for successful authentications from unexpected IP addresses, unusual timing patterns, or failed login attempts preceding successful access.Affected if Log entries show unauthenticated access attempts or successful access from unrecognized sources.
A user is affected if Versa Director is present and its management interface is accessible from untrusted networks without having applied the vendor patch.
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 dataApply vendor-supplied patches or updates for Versa Director. If no patch is available, restrict network access to the Versa Director management interface to trusted IP addresses only and audit all administrative accounts for unauthorized access.
- 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-2018-16496 — 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-2018-16496 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data