Vedge 100 FirmwareOperating system · Cisco
CVE-2018-0434
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 in the Zero Touch Provisioning feature of the Cisco SD-WAN Solution could allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data by using an invalid certificate. The vulnerability is due to insufficient certificate validation by the affected software. An attacker could exploit this vulnerability by supplying a crafted certificate to an affected device. A successful exploit could allow the attacker to conduct man-in-the-middle attacks to decrypt confidential information on user connections to the affected software.
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 confidenceThe Zero Touch Provisioning feature in Cisco SD-WAN insufficiently validates certificates, allowing an unauthenticated remote attacker to supply a crafted certificate and gain unauthorized access to sensitive data. This weakness enables man-in-the-middle attacks that can decrypt confidential user connections to the affected software.
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
Vedge 100 FirmwareOperating system
< 18.3.0
Vedge 1000 FirmwareOperating system
< 18.3.0
Vedge 2000 FirmwareOperating system
< 18.3.0
Vedge 5000 FirmwareOperating system
< 18.3.0
Vmanage Network Management SystemApplication
all 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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 the Cisco SD-WAN product modelLocate the hardware model number on the device label or use the device's web interface or CLI to query the system model designation (Vedge 100, Vedge 1000, Vedge 2000, Vedge 5000, or Vmanage)Affected if The device is any of the Vedge models or Vmanage
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Check the firmware version on Vedge devicesAccess the device CLI or web interface and retrieve the current firmware version numberAffected if The firmware version is less than 18.3.0 on any Vedge model (100, 1000, 2000, or 5000)
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Confirm Vmanage is in useIdentify if Cisco Vmanage Network Management System is deployed in the environmentAffected if Vmanage is present regardless of version (all versions are affected)
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Determine if Zero Touch Provisioning is enabledCheck the ZTP configuration status through the device CLI, web interface, or Vmanage console to see if ZTP is actively configured or availableAffected if ZTP feature is enabled or available on the device
You are affected if you run any Vedge firmware below 18.3.0 or any version of Vmanage with ZTP enabled or accessible in your environment.
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 data18.3.0
Apply the Cisco patch for this vulnerability and ensure proper certificate chain validation is enforced during the ZTP process.
Fix this in Vedge 100 Firmware
Scoped from the published advisory
- Consultation6.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,712.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-0434 — 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-2018-0434 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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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