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Actively exploited in the wild. This CVE is on the CISA Known Exploited Vulnerabilities list — treat remediation as urgent. Federal remediation due by 18 Apr 2022.
Sma 100 FirmwareOperating system · Sonicwall

CVE-2019-7483

HIGH · 7.5 CVSS v3.1 Published 2019-12-19
Fix available
A fix is available. Upgrade to 9.0.0.4 or later.
See remediation →
100/100
Remediation priority · Urgent
In the wild Remotely reachable No privileges 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
In SonicWall SMA100, an unauthenticated Directory Traversal vulnerability in the handleWAFRedirect CGI allows the user to test for the presence of a file on the server.

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

An unauthenticated directory traversal vulnerability in the handleWAFRedirect CGI of SonicWall SMA100 appliances allows remote attackers to test for the existence of files on the server file system without authentication.

MitigationApply the vendor-supplied patch or firmware update from SonicWall to remediate the directory traversal vulnerability in handleWAFRedirect; as a compensating control, restrict external access to the SMA web interface to trusted IP addresses if immediate patching is not feasible.

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
Sma 100 FirmwareOperating system
Affected:< 9.0.0.4

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

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

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

  1. Identify the device as a SonicWall SMA100 appliance
    Log into the SMA administrative interface or check the device model through the management console or physical labeling. The SMA 100 series includes SMA 200, 210, 400, 410, 500, and 500v appliances.
    Affected if The device is a SonicWall SMA 100 series appliance running the affected firmware.
  2. Determine the installed firmware version
    Access the SMA web interface, navigate to System > Status or About page to view the current firmware version. Alternatively, use the command line and run 'diag sys info' or check /etc/version file if CLI access is available.
    Affected if The firmware version is lower than 9.0.0.4 (for example, 9.0.0.3, 8.x, or earlier).
  3. Verify the handleWAFRedirect CGI endpoint is accessible
    Send an HTTP GET request to the handleWAFRedirect endpoint from an external location, for example: curl -k https://<target>/cgi-bin/handleWAFRedirect?st=../../../../etc/passwd
    Affected if The server responds to requests for the handleWAFRedirect endpoint without requiring authentication, indicating the vulnerable CGI is exposed.
  4. Confirm unauthenticated access is possible to the SMA web interface
    Attempt to access the SMA login page from an untrusted/external network without providing credentials. Verify whether the web interface accepts unauthenticated connections on ports 443 or 8443.
    Affected if The SMA web interface (ports 443/8443) is accessible from untrusted networks without authentication, allowing potential exploitation of the directory traversal flaw.

The environment is affected if any SonicWall SMA 100 series appliance is running firmware version 9.0.0.3 or earlier, with the handleWAFRedirect CGI endpoint exposed to untrusted networks.

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.

dbcve · scoped
Upgrade available Upgrade to 9.0.0.4 or later
Fixed in 9.0.0.4
Interim mitigation

Apply the vendor-supplied patch or firmware update from SonicWall to remediate the directory traversal vulnerability in handleWAFRedirect; as a compensating control, restrict external access to the SMA web interface to trusted IP addresses if immediate patching is not feasible.

Recommended fix Moderate confidence

SMA 100 Firmware 9.0.0.4 or later

  1. 1. Log into the SMA 100 appliance administrative interface.
  2. 2. Navigate to System > Firmware or System Administration > Firmware Management.
  3. 3. Check the current firmware version under Device Status or System Status.
  4. 4. Download firmware version 9.0.0.4 or later from the official SonicWall support portal (psirt.global.sonicwall.com or my.sonicwall.com).
  5. 5. In the firmware management section, select the option to Upgrade or Upload firmware.
  6. 6. Browse to the downloaded firmware file and initiate the upgrade.
  7. 7. Wait for the upgrade to complete - do not power off the device during this process.
  8. 8. After the device reboots, verify the new firmware version is 9.0.0.4 or later.
Caveat Review SonicWall release notes for version 9.0.0.4 for any configuration or feature changes that may affect your deployment

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Sma 100 Firmware Exploited in the wild — priority engagement
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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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-2019-7483 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