Security readout for executives and security teams
Plain-English summary
CVE-2017-20224 affects the Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0. Its web interface reportedly permits unauthenticated WebDAV file operations, allowing an internet attacker to upload or manipulate content. Business risk is high where these routers are exposed, because compromise could disrupt connectivity or enable deeper network access.
Executive priority
Prioritize immediately if these routers support critical connectivity or are internet-exposed. The vulnerability is unauthenticated and critical, but action should focus first on confirming whether this specific model and version exist in the environment.
Technical view
The issue is an arbitrary file upload weakness, mapped to CWE-434. Sources state enabled WebDAV HTTP methods such as PUT, DELETE, MKCOL, MOVE, COPY, and PROPPATCH can be abused without authentication to upload executable content, delete files, or alter server content. CVSS is 9.8, network exploitable, low complexity, no privileges, no user interaction.
Likely exposure
Exposure is limited to Telesquare SDT-CS3B1 devices running version 1.2.0, especially if their management service is reachable from untrusted networks. The sources do not identify other affected models or versions.
Exploitation context
Public advisories describe the vulnerable WebDAV behavior and its impact. The provided bundle does not show CISA KEV listing or confirmed active exploitation. Treat internet-exposed devices as urgent due to unauthenticated network access and full confidentiality, integrity, and availability impact in the CVSS assessment.
Researcher notes
Evidence is based on the CVE record and third-party advisories. Sources name SDT-CS3B1 version 1.2.0 only. No official vendor patch details are included in the provided sources. Avoid assuming broader Telesquare exposure without additional evidence.
Mitigation direction
- Identify any Telesquare SDT-CS3B1 routers running firmware version 1.2.0.
- Restrict router management interfaces from the internet and untrusted networks.
- Disable WebDAV methods if vendor-supported and operationally safe.
- Check Telesquare or operator guidance for firmware updates or official remediation.
- Replace or isolate devices if no supported fix is available.
Validation and detection
- Inventory network assets for Telesquare SDT-CS3B1 devices.
- Confirm firmware version and exposed management services.
- Review web server configuration for enabled WebDAV methods.
- Check perimeter scans for externally reachable router management interfaces.
- Monitor logs for unexpected file creation, deletion, or WebDAV method use.
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-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-20224 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
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- Zero Science Lab DisclosureCVE reference · third-party-advisory
- CXSecurityCVE reference · third-party-advisory
- VulnCheck Advisory: Telesquare SKT LTE Router SDT-CS3B1 WebDAV Arbitrary File UploadCVE reference · third-party-advisory
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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.