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Sma 200 FirmwareOperating system · Sonicwall

CVE-2024-40763

HIGH · 7.5 CVSS v3.1 Published 2024-12-05
Fix available
A fix is available. Upgrade to 10.2.1.14-75sv or later.
See remediation →
81/100
Remediation priority · High
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
Heap-based buffer overflow vulnerability in the SonicWall SMA100 SSLVPN due to the use of strcpy. This allows remote authenticated attackers to cause Heap-based buffer overflow and potentially lead to code execution.

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 · moderate confidence

Heap-based buffer overflow in SonicWall SMA100 series SSL VPN products due to unsafe use of strcpy() function. Authenticated remote attackers can trigger the overflow by sending specially crafted input, potentially achieving code execution with the privileges of the affected service.

MitigationApply vendor-supplied patches immediately; if unavailable, restrict SSL VPN access to minimal necessary users and monitor for indicators of compromise. Consider network segmentation to limit exposure.

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 200 FirmwareOperating system
Affected:< 10.2.1.14-75sv
Sma 210 FirmwareOperating system
Affected:< 10.2.1.14-75sv
Sma 400 FirmwareOperating system
Affected:< 10.2.1.14-75sv
Sma 410 FirmwareOperating system
Affected:< 10.2.1.14-75sv
Sma 500v FirmwareOperating system
Affected:< 10.2.1.14-75sv

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

CVSS:3.1/AV:N/AC:H/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 SMA appliance model
    Access the SonicWall SMA web management console or check the physical device label. Navigate to Device > Settings > About or view the homepage dashboard which displays the model number (SMA 200, 210, 400, 410, or 500v).
    Affected if The model is one of: SMA 200, SMA 210, SMA 400, SMA 410, or SMA 500v.
  2. Check installed firmware version
    In the SMA web console, go to Device > Settings > Firmware or the About page. Note the displayed firmware version number (for example: 10.2.1.12-62sv or 10.2.1.14-75sv). Alternatively, log in via SSH and run: ' version' or 'cat /etc/os-release' to retrieve firmware details.
    Affected if The installed firmware version is earlier than 10.2.1.14-75sv (for example, 10.2.1.x versions below 10.2.1.14-75sv).
  3. Verify SSL VPN service is enabled
    In the SMA web console, navigate to Users > Settings > SSL VPN or check the SSL VPN configuration page. Confirm the SSL VPN portal or network connector is enabled and actively listening on the configured port (default 443).
    Affected if The SSL VPN feature is enabled and accessible.
  4. Confirm remote authentication is permitted
    In the SMA web console, go to Users > Authentication > Users or the authentication settings. Verify that remote user authentication is allowed for VPN access, which is required for an authenticated attacker to trigger the overflow.
    Affected if Remote authentication is enabled, allowing users to authenticate to the SSL VPN service.

You are affected if you have a SonicWall SMA 200, 210, 400, 410, or 500v device running firmware versions earlier than 10.2.1.14-75sv, with SSL VPN and remote authentication enabled.

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 10.2.1.14-75sv or later
Fixed in 10.2.1.14-75sv
Interim mitigation

Apply vendor-supplied patches immediately; if unavailable, restrict SSL VPN access to minimal necessary users and monitor for indicators of compromise. Consider network segmentation to limit exposure.

Recommended fix High confidence

SMA 200/210/400/410/500v Firmware: 10.2.1.14-75sv or later

  1. Identify the exact SonicWall SMA model (200, 210, 400, 410, or 500v) currently deployed
  2. Access the SMA appliance administrative interface or console
  3. Navigate to the firmware management or system settings section
  4. Download the firmware version 10.2.1.14-75sv or later from the official SonicWall support portal (psirt.global.sonicwall.com)
  5. Upload and apply the new firmware version following SonicWall's standard upgrade procedure
  6. After upgrade, verify the firmware version is 10.2.1.14-75sv or higher
  7. Confirm the SSLVPN service is functioning normally
Caveat Standard firmware upgrade risks apply - ensure backup configuration is saved and plan for brief service interruption during upgrade window

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

Fix this in Sma 200 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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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-2024-40763 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