dbcve.org
Catalyst Sd Wan ManagerApplication · Cisco

CVE-2021-1484

MEDIUM · 6.5 CVSS v3.1 Published 2024-11-15
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click

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 · unedited
A vulnerability in the web UI of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to inject arbitrary commands on an affected system and cause a denial of service (DoS) condition. This vulnerability is due to improper input validation of user-supplied input to the device template configuration. An attacker could exploit this vulnerability by submitting crafted input to the device template configuration. A successful exploit could allow the attacker to cause a DoS condition on the affected system.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

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 confidence

A command injection vulnerability in the web UI of Cisco SD-WAN vManage Software allows an authenticated attacker to inject arbitrary commands via crafted input to the device template configuration. Successful exploitation also causes a denial of service condition on the affected system.

MitigationApply the Cisco software updates that address this vulnerability. Since no workarounds exist and authentication is required, ensure proper access controls and monitor for suspicious device template configuration activity.

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
Catalyst Sd Wan ManagerApplication
Affected:= 17.2.4= 17.2.5= 17.2.6= 17.2.7= 17.2.8= 17.2.9= 17.2.10= 18.2.0= 18.3.0= 18.3.1= 18.3.1.1= 18.3.3

CVSS 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
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify Cisco SD-WAN vManage installation
    Log into the device and run 'show version' or check the vManage web UI login page for version information. The product is typically identified as 'Cisco SD-WAN vManage' or 'Cisco Catalyst SD-WAN Manager' in the system.
    Affected if The system is running Cisco SD-WAN vManage software
  2. Verify installed version against affected list
    Run 'show version' or access the vManage admin page to obtain the exact version number. Compare it to: 17.2.4, 17.2.5, 17.2.6, 17.2.7, 17.2.8, 17.2.9, 17.2.10, 18.2.0, 18.3.0, 18.3.1, 18.3.1.1, or 18.3.3.
    Affected if The installed version matches any of the listed affected versions exactly
  3. Confirm web UI is enabled
    Check if the vManage web interface is accessible and running. This can be verified by attempting to reach the vManage HTTPS portal or running 'show web-server status' if available.
    Affected if The vManage web UI is accessible and operational
  4. Verify device template configuration access
    Check if authenticated users have access to the Device Templates feature in vManage. This is found under the 'Configuration' > 'Device Templates' section in the web UI.
    Affected if Authenticated users can access or modify device templates in the vManage interface

If the system is running Cisco SD-WAN vManage, the version matches any of the 12 affected versions listed, and the web UI with device template configuration is accessible, the environment is vulnerable to CVE-2021-1484.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the Cisco software updates that address this vulnerability. Since no workarounds exist and authentication is required, ensure proper access controls and monitor for suspicious device template configuration activity.

Fix this in Catalyst Sd Wan Manager Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing6.0 h
  • Review / QA3.0 h
16.0 hours of engineering $2,760
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-1484 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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