Security readout for executives and security teams
Plain-English summary
This affects Telesquare SKT LTE Router SDT-CS3B1 version 1.2.0. A missing request-validation control can let an attacker abuse a logged-in router administrator’s browser to trigger administrative actions, including system command execution. The CVE is rated medium, but business impact depends heavily on whether these routers are deployed and reachable for administration.
Executive priority
Treat as a targeted infrastructure exposure, not a broad enterprise emergency. Prioritize if these LTE routers support critical connectivity, remote sites, or operational networks. Confirm presence first, then reduce management-plane exposure while checking vendor or provider remediation options.
Technical view
CVE-2017-20221 is a CWE-352 cross-site request forgery issue in SDT-CS3B1 1.2.0. Public advisories describe arbitrary system command execution through administrative functionality lacking request validation. The record lists CVSS 4.0 score 5.3 with low attack complexity and low privileges. Public exploit references exist, but KEV status is false in the provided bundle.
Likely exposure
Organizations are likely exposed only if they operate Telesquare SDT-CS3B1 routers running version 1.2.0, especially where administrators access the web management interface from normal browsing environments or where management access is broadly reachable.
Exploitation context
Sources include public exploit listings from Packet Storm and Exploit-DB, indicating technical details have been publicly available. The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation depends on access to an authenticated administrative context or inducing an authenticated administrator’s browser to perform actions.
Researcher notes
The source bundle ties the issue to SDT-CS3B1 version 1.2.0 only. Patch status is not established in the provided sources. Public exploit references exist, so validation should focus on safe version identification, exposure review, and management-plane hardening rather than reproducing command execution.
Mitigation direction
- Inventory Telesquare SDT-CS3B1 devices and confirm firmware version.
- Check Telesquare or service-provider guidance for supported firmware or configuration remediation.
- Restrict router management interfaces to trusted administrative networks only.
- Separate router administration from general web browsing sessions.
- Review administrative accounts and remove unnecessary access.
Validation and detection
- Identify SDT-CS3B1 routers in asset and network inventories.
- Verify whether any device reports version 1.2.0.
- Confirm management interfaces are not internet-exposed.
- Review access controls for administrative web interfaces.
- Monitor router logs for unexpected administrative actions.
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-352: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCVE-2017-20221 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
- Medium
- CVSS
- 5.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.3MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
Source materials
- CVE List V5 sourceCVE List V5
- Zero Science Lab DisclosureCVE reference · third-party-advisory
- CXSecurityCVE reference · third-party-advisory
- Packet Storm SecurityCVE reference · exploit
- Exploit DBCVE reference · exploit
- IBM X-Force ExchangeCVE reference · vdb-entry
- VulnCheck Advisory: Telesquare SKT LTE Router SDT-CS3B1 CSRF System Command ExecutionCVE 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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.