Security readout for executives and security teams
Plain-English summary
A Swift Sensors Gateway SG3-1010 could be taken over remotely if an attacker can reach it on the network. The issue is unauthenticated and scored CVSS 10.0, so exposed devices should be treated as high business risk until vendor guidance is confirmed and access is tightly restricted.
Executive priority
Prioritize immediately if any SG3-1010 gateway is deployed or externally reachable. The business concern is full device compromise without credentials, potentially affecting sensor operations, data integrity, and adjacent network security.
Technical view
CVE-2021-40422 is an authentication bypass in Swift Sensors Gateway SG3-1010 device password generation functionality. The CVE states that specially crafted network requests can lead to remote code execution. The record maps to CWE-798 and CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Likely exposure
Exposure is limited to environments running Swift Sensors Gateway SG3-1010. Risk is highest where the gateway is reachable from untrusted networks, because the CVSS vector indicates network access, no privileges, and no user interaction.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. They do state remote code execution is possible through a sequence of network requests, so defenders should assume reachable devices are attractive targets even without confirmed exploitation.
Researcher notes
Evidence is limited to the CVE bundle and Talos reference. The bundle does not name a specific fixed version, patch, endpoint, or active exploitation. Avoid exploit reproduction; focus validation on asset identification, reachability, firmware status, and defensive telemetry.
Mitigation direction
- Inventory Swift Sensors Gateway SG3-1010 devices and owners.
- Check Swift Sensors and Talos guidance for fixed firmware or vendor mitigations.
- Restrict gateway access to trusted management networks only.
- Block internet and untrusted network reachability to affected gateways.
- Monitor for unusual unauthenticated activity targeting password generation functionality.
Validation and detection
- Confirm whether any deployed gateway is model SG3-1010.
- Review firewall rules for untrusted network paths to gateways.
- Check asset records for firmware and vendor support status.
- Search logs for unusual repeated unauthenticated gateway requests.
- Document remediation status and compensating controls per device.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-798: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-40422 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 10 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1431CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of Hard-coded Credentials
Use of Hard-coded Credentials represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.