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Sg3 1010 FirmwareOperating system · Swiftsensors

CVE-2021-40422

CRITICAL · 10.0 CVSS v3.1 Published 2022-04-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Public exploit 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
An authentication bypass vulnerability exists in the device password generation functionality of Swift Sensors Gateway SG3-1010. A specially-crafted network request can lead to remote code execution. An attacker can send a sequence of requests to trigger 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 · moderate confidence

Swift Sensors Gateway SG3-1010 contains an authentication bypass vulnerability in its device password generation functionality. Attackers can send a sequence of specially-crafted network requests to bypass authentication and achieve remote code execution on the affected gateway device.

MitigationApply vendor-supplied firmware patches when available; until then, isolate affected gateways behind restrictive network access controls and monitor for unauthorized access attempts.

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
Sg3 1010 FirmwareOperating system
Affected:all versions

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
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 the device model
    Locate the physical device or log into the network to identify if any device is a Swift Sensors Gateway SG3-1010. Check device labels, network inventory, or management console for model number SG3-1010.
    Affected if The device is confirmed to be a Swift Sensors SG3-1010 gateway
  2. Determine the firmware version
    Access the device web interface or management console and navigate to the firmware/version information page. Alternatively, check the device documentation or SNMP/sysinfo output for firmware build details.
    Affected if Firmware version information cannot be retrieved, or the device is confirmed to be running any firmware version (all versions are affected)
  3. Verify network exposure of the device
    Check network configuration to determine if the device management interface is directly accessible from untrusted networks. Use network scans or firewall rules to identify exposed management ports (typically HTTP/HTTPS on common web ports).
    Affected if The device management interface is accessible from external or untrusted network segments without VPN or jump host isolation
  4. Test for authentication bypass behavior
    From an unauthenticated context, attempt to access the password generation or device configuration endpoints. Observe whether authentication is enforced or can be bypassed through malformed requests.
    Affected if Unauthenticated or specially-crafted requests to password-related endpoints succeed without valid credentials
  5. Check for unauthorized access indicators
    Review device logs, authentication logs, and network traffic logs for unexpected IP addresses accessing the device, unusual authentication patterns, or commands consistent with remote code execution.
    Affected if Logs show authentication attempts from unknown sources, successful logins without corresponding credential entries, or unexpected command execution

You are affected if you have a Swift Sensors SG3-1010 gateway device with any firmware version and its management interface is network-accessible.

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 vendor-supplied firmware patches when available; until then, isolate affected gateways behind restrictive network access controls and monitor for unauthorized access attempts.

Fix this in Sg3 1010 Firmware Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing6.0 h
  • Review / QA3.0 h
27.0 hours of engineering $4,800
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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-2021-40422 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