CVE-2016-4926
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 · uneditedInsufficient authentication vulnerability in Junos Space before 15.2R2 allows remote network based users with access to Junos Space web interface to perform certain administrative tasks without authentication.
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 confidenceJunos Space versions before 15.2R2 contain an authentication bypass vulnerability in the web interface. Remote attackers with network access to the Junos Space web interface can execute certain administrative functions without providing any valid credentials.
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<= 15.2CVSS 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:3.0/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 Junos Space installationCheck if Junos Space virtual appliance or hardware is present in your environment. Look for systems running the Junos Space platform, typically accessible via web interface on port 443 or 8443.Affected if Junos Space software is deployed in the environment
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Determine Junos Space versionAccess the Junos Space web interface and navigate to Admin > System > Software or check the login page footer for version information. Alternatively, log into the Space CLI and run 'show version' or 'system show version' command.Affected if Installed version is 15.2 or any version before 15.2R2
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Verify web interface is accessibleConfirm network accessibility to the Junos Space management web interface by attempting to reach the IP/hostname on ports 443 or 8443 from untrusted networks.Affected if The Junos Space web interface is exposed to networks beyond trusted management networks
You are affected if Junos Space version 15.2 or earlier is installed and its web interface is network-accessible, since versions prior to 15.2R2 allow unauthenticated administrative function execution.
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.
dbcve · scopedUpgrade Junos Space to version 15.2R2 or later. Additionally, restrict network access to the Junos Space management interface to trusted networks until the upgrade can be applied.
15.2R2 or later (Junos Space version 15.2R2 addresses this vulnerability)
- Back up the current Junos Space configuration and database
- Download Junos Space 15.2R2 or later from the Juniper Networks support portal
- Log into the Junos Space web interface as an administrator
- Navigate to the Administration > System > Software Update section
- Upload and apply the 15.2R2 software update
- Restart services as prompted during the upgrade process
- Verify the Junos Space version shows 15.2R2 or later after upgrade
- Confirm normal operations and login functionality are restored
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation6.0 h
- Testing5.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-4926 — 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-2016-4926 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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