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NetextenderApplication · Sonicwall

CVE-2022-22281

HIGH · 7.8 CVSS v3.1 Published 2022-05-13
Fix available
A fix is available. Upgrade to after 10.2.322 or later.
See remediation →
80/100
Remediation priority · High
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 buffer overflow vulnerability in the SonicWall SSL-VPN NetExtender Windows Client (32 and 64 bit) in 10.2.322 and earlier versions, allows an attacker to potentially execute arbitrary code in the host windows operating system.

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 buffer overflow vulnerability exists in the SonicWall SSL-VPN NetExtender Windows Client (both 32-bit and 64-bit versions) through version 10.2.322. The vulnerability allows an attacker to potentially execute arbitrary code on the target Windows host operating system.

MitigationUpgrade the SonicWall NetExtender Windows Client to a version newer than 10.2.322 that contains the security patch. Until patched, limit exposure by ensuring only trusted users connect to the VPN and by keeping endpoint protections enabled.

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
NetextenderApplication
Affected:<= 10.2.322

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
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 checks

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

  1. Identify if NetExtender is installed
    Open Windows Settings > Apps > Apps & Features, or use PowerShell: Get-ItemProperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' | Where-Object {$_.DisplayName -like '*NetExtender*'}. Also check Program Files for NetExtender folders.
    Affected if NetExtender is not found on the system, then not affected by this specific vulnerability.
  2. Determine the installed NetExtender version
    If installed, locate the version by right-clicking the NetExtender executable in Program Files (typically in SonicWall\NetExtender or similar), selecting Properties, and checking the Details tab for File Version. Alternatively, launch NetExtender and look in the About or Help section.
    Affected if The displayed version is 10.2.322 or lower.
  3. Verify exact version number against affected range
    Compare the found version number to the affected range: versions <= 10.2.322 are vulnerable. Note that the version format may appear as 10.2.322.x - any build at or below 10.2.322 is within the affected range.
    Affected if Version is 10.2.322 or any version number lower than 10.2.322.
  4. Confirm NetExtender client is enabled or configured
    Check if NetExtender is configured as a VPN connection on the Windows machine. Look for NetExtender profiles in Windows VPN settings, or check if the NetExtender service is present in Services.msc and set to run.
    Affected if NetExtender is installed and configured as an available VPN connection on the system.

A user is affected if SonicWall NetExtender is installed on their Windows system with a version number at or below 10.2.322.

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 a release after 10.2.322
Interim mitigation

Upgrade the SonicWall NetExtender Windows Client to a version newer than 10.2.322 that contains the security patch. Until patched, limit exposure by ensuring only trusted users connect to the VPN and by keeping endpoint protections enabled.

Recommended fix Moderate confidence

NetExtender 10.2.331 or later

  1. 1. Open the SonicWall NetExtender client or navigate to the SonicWall support site.
  2. 2. Download the latest version of NetExtender Windows Client (version 10.2.331 or later).
  3. 3. Uninstall the current NetExtender client from the Windows system via Control Panel > Programs and Features.
  4. 4. Install the newly downloaded NetExtender client version.
  5. 5. Restart the Windows system if prompted.
  6. 6. Verify the installed version matches the fixed release (10.2.331 or later) by checking Help > About in the NetExtender client.
Caveat Review SonicWall release notes for any new feature requirements or compatibility changes with your VPN appliance before upgrading

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

Fix this in Netextender Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA2.0 h
10.0 hours of engineering $1,780
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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-2022-22281 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