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Tc Mguard Rs4000 4g Vzw Vpn FirmwareOperating system · Phoenixcontact

CVE-2024-43386

HIGH · 8.8 CVSS v3.1 Published 2024-09-10
Fix available
A fix is available. Upgrade to 8.9.3 or later.
See remediation →
94/100
Remediation priority · Urgent
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 low privileged remote attacker can trigger the execution of arbitrary OS commands as root due to improper neutralization of special elements in the variable EMAIL_NOTIFICATION.TO in mGuard devices.

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 mGuard devices allows a low-privileged remote attacker to execute arbitrary OS commands as root by injecting special elements into the EMAIL_NOTIFICATION.TO variable, likely through the web management interface where email notification settings are configured.

MitigationImplement strict input validation and sanitization for the EMAIL_NOTIFICATION.TO field to prevent command injection, and apply vendor patches if available.

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
Tc Mguard Rs4000 4g Vzw Vpn FirmwareOperating system
Affected:< 8.9.3
Tc Mguard Rs4000 4g Vpn FirmwareOperating system
Affected:< 8.9.3
Tc Mguard Rs4000 4g Att Vpn FirmwareOperating system
Affected:< 8.9.3
Tc Mguard Rs4000 3g Vpn FirmwareOperating system
Affected:< 8.9.3
Tc Mguard Rs2000 4g Vzw Vpn FirmwareOperating system
Affected:< 8.9.3
Tc Mguard Rs2000 4g Vpn FirmwareOperating system
Affected:< 8.9.3
Tc Mguard Rs2000 4g Att Vpn FirmwareOperating system
Affected:< 8.9.3
Tc Mguard Rs2000 3g Vpn FirmwareOperating system
Affected:< 8.9.3

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
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/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 mGuard device model
    Locate the device model label on the hardware unit or check the device status page in the web management interface under Device Information or System Status
    Affected if The device model is one of the RS4000 or RS2000 series variants (4g Vzw, 4g, 4g Att, 3g)
  2. Check firmware version
    In the web management interface, navigate to System > Firmware or Device Information to view the installed firmware version
    Affected if The firmware version is lower than 8.9.3 (for example, 8.8.x or earlier)
  3. Verify email notification feature is configured
    In the web management interface, locate the email notification settings (usually under Configuration > Notifications or Administration > Email Settings) and check if an email address is populated in the TO field
    Affected if Email notification is enabled and an EMAIL_NOTIFICATION.TO address is configured on the device
  4. Inspect EMAIL_NOTIFICATION.TO for injection artifacts
    Review the configured email address in the EMAIL_NOTIFICATION.TO field for special shell characters such as semicolons, pipes, backticks, dollar signs, or command sequences
    Affected if The EMAIL_NOTIFICATION.TO field contains shell metacharacters or suspicious patterns that could indicate exploitation attempts

A user is affected if they are running any of the listed mGuard device models with firmware version below 8.9.3 and have email notification configured with the TO field accessible to a low-privileged remote attacker.

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 8.9.3 or later
Fixed in 8.9.3
Interim mitigation

Implement strict input validation and sanitization for the EMAIL_NOTIFICATION.TO field to prevent command injection, and apply vendor patches if available.

Recommended fix High confidence

Firmware version 8.9.3 or later

  1. 1. Download the firmware version 8.9.3 or later from the official vendor source (cert.vde.com or Siemens/Tecware support portal)
  2. 2. Access the mGuard device web management interface using an administrator account
  3. 3. Navigate to the firmware update or system maintenance section
  4. 4. Upload the downloaded firmware file (8.9.3 or later)
  5. 5. Confirm the firmware installation and allow the device to reboot
  6. 6. After reboot, verify the new firmware version is installed and the device is operational
  7. 7. Confirm the EMAIL_NOTIFICATION.TO parameter is now properly sanitized
Caveat Review release notes for any configuration or feature changes between current version and 8.9.3; backup device configuration before upgrade

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

Fix this in Tc Mguard Rs4000 4g Vzw Vpn Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
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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-2024-43386 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