Security readout for executives and security teams
Plain-English summary
CVE-2017-20222 lets an unauthenticated remote attacker force a Telesquare SKT LTE Router SDT-CS3B1 running version 1.2.0 to reboot. The business impact is availability: repeated reboots can disrupt LTE connectivity for sites or devices relying on this router. Public exploit references exist, but the provided sources do not show confirmed active exploitation.
Executive priority
Treat as a high-priority availability risk if these routers support business-critical connectivity or are remotely reachable. Prioritize inventory and access restriction first. If devices are isolated from untrusted networks, urgency is lower but remediation planning is still warranted because public exploit references exist.
Technical view
The issue is CWE-306: missing authentication for a reboot function in SDT-CS3B1 software 1.2.0. The CVSS 4.0 score is 8.7, driven by network reachability, low complexity, no privileges, no user interaction, and high availability impact. Sources describe unauthenticated POST interaction with the router’s LTE CGI management function triggering reboot.
Likely exposure
Exposure is most likely where SDT-CS3B1 routers running software 1.2.0 have their management interface reachable from untrusted networks. Internet-facing or broadly reachable administrative services increase denial-of-service risk. The sources do not identify other affected models or versions.
Exploitation context
Public exploit listings are referenced by Packet Storm and Exploit-DB, so defenders should assume the technique is known. The CVE is not listed as KEV in the provided bundle, and no cited source confirms active exploitation. The practical impact is remote reboot and service interruption, not data theft or code execution based on available evidence.
Researcher notes
The record is unusually recent for a 2017-era issue, with publication in 2026 per the provided data. Evidence supports one affected product and version: Telesquare SDT-CS3B1 1.2.0. No official vendor patch is included in the provided sources. Avoid expanding scope beyond the named model/version without additional vendor evidence.
Mitigation direction
- Identify Telesquare SDT-CS3B1 devices and confirm software version.
- Restrict router management access to trusted administrative networks only.
- Block untrusted access to the affected web management interface.
- Check Telesquare or service-provider guidance for firmware updates or official mitigation.
- Monitor for unexpected reboot patterns or availability drops.
Validation and detection
- Inventory LTE routers by model and firmware version.
- Verify whether any SDT-CS3B1 version 1.2.0 devices are deployed.
- Confirm management interfaces are not internet-exposed.
- Review firewall and ACL rules protecting router administration.
- Check logs or uptime history for unexplained reboots.
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-306: 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 lookupCVE-2017-20222 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
- High
- CVSS
- 8.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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 Unauthenticated Remote RebootCVE 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.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.