CVE-2022-20818
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 · uneditedMultiple vulnerabilities in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to gain elevated privileges. These vulnerabilities are due to improper access controls on commands within the application CLI. An attacker could exploit these vulnerabilities by running a malicious command on the application CLI. A successful exploit could allow the attacker to execute arbitrary commands as the root user.
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 confidenceMultiple vulnerabilities in the CLI of Cisco SD-WAN Software allow an authenticated local attacker to execute arbitrary commands as root due to improper access controls on privileged CLI commands. The attacker must have valid credentials to access the device CLI, then exploits the flaw to escalate privileges from their authenticated session to root-level execution.
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< 20.9< 20.9< 20.9< 20.9CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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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Check installed SD-WAN software versionLog into the CLI and run the command 'show version' or 'show software' to display the installed version. For vManage, you can also check via the web UI under Administration > Software Repository.Affected if The displayed version is any release prior to 20.9 (for example 20.6.x, 20.7.x, 20.8.x).
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Identify the specific SD-WAN componentRun 'show system identity' or 'show vedge-cloud info' (for vEdge hardware) to determine whether the device is a vBond Orchestrator, vManage, vSmart Controller, or vEdge router, as all four component types are affected.Affected if The device runs any affected component type with version < 20.9.
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Verify CLI user access controlsReview the local user configuration by running 'show users' and 'show running-config | include username' to see which accounts have CLI access and their privilege levels.Affected if Any local user account exists on the system (the vulnerability allows any authenticated user to escalate to root).
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Check for unauthorized root sessionsRun 'show processes cpu history' or 'show system resources' to look for unexpected high-privilege processes. Review any logged sessions for commands run by non-admin users that should not be accessible to them.Affected if Evidence exists of commands executed outside the expected privilege scope for a given user account.
You are affected if your Cisco SD-WAN vBond Orchestrator, vManage, vSmart Controller, or vEdge device runs software version earlier than 20.9 and has user accounts with CLI access.
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 · scoped20.9
Apply the Cisco-provided software update/patch for CVE-2022-20818. Until patched, limit CLI access to trusted personnel only and monitor for suspicious command execution.
Cisco SD-WAN version 20.9 or later (20.9, 20.10+, or latest stable release)
- Identify the specific SD-WAN component (Vbond Orchestrator, Vmanage, or Vsmart Controller) currently deployed
- Determine the current installed version using the CLI command 'show version' or through the web UI
- Plan the upgrade ensuring adequate downtime window and backup of current configuration
- Upgrade the software to version 20.9 or later following Cisco's standard SD-WAN upgrade procedures
- After upgrade, verify the new version is installed using 'show version'
- Confirm the CLI access controls are functioning properly
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-20818 — 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-2022-20818 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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