Security readout for executives and security teams
Plain-English summary
This issue affects Cypress Solutions CTM-200/CTM-ONE devices identified as version 1.3.6. A built-in root credential can allow remote administrative access over Telnet or SSH. For organizations using these devices in operational networks, the main risk is unauthorized control of the device if management access is reachable.
Executive priority
Prioritize as critical for any organization using these devices in production or remote sites. The business concern is unauthorized device takeover, not just data exposure. Immediate focus should be asset identification, management-plane isolation, and vendor remediation confirmation.
Technical view
CVE-2021-47744 is a CWE-798 hard-coded credentials flaw. The public records describe unauthenticated remote root access through Telnet or SSH using a static credential in the device Linux distribution. CVSS v4.0 is 9.3. The provided data names CTM-200/CTM-ONE 1.3.6, while affected metadata is sparse.
Likely exposure
Exposure is most likely where Cypress CTM-200 or CTM-ONE 1.3.6 devices have Telnet or SSH reachable from untrusted networks. Risk is lower if management services are disabled, isolated, or limited to trusted administrative networks.
Exploitation context
A public ExploitDB reference and third-party advisories exist. The source bundle does not show CISA KEV listing or confirmed active exploitation. Treat internet-reachable Telnet or SSH on affected devices as high urgency due to remote root impact.
Researcher notes
The public source bundle supports remote root access via hard-coded credentials, but does not provide complete vendor affected-version metadata or a named patch. Avoid relying on the CVE affected field alone; correlate with device model, firmware, and third-party advisory details.
Mitigation direction
- Identify any Cypress CTM-200 or CTM-ONE devices in the environment.
- Check vendor guidance for patched firmware or official remediation.
- Remove Telnet and SSH exposure from the internet and untrusted networks.
- Restrict management access to trusted administrative networks or VPNs.
- Disable Telnet or SSH where not operationally required.
- Do not assume password rotation fixes a hard-coded credential issue.
Validation and detection
- Confirm device model and firmware version against vendor records.
- Determine whether Telnet or SSH is enabled on each device.
- Verify management services are not reachable from untrusted networks.
- Review device access logs for unexpected root or administrative access.
- Track Cypress, CVE, VulnCheck, and Zero Science updates for remediation details.
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 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-2021-47744 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
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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:H/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50407CVE reference · exploit
- Cypress Solutions Official HomepageCVE reference · product
- Zero Science Lab Disclosure (ZSL-2021-5686)CVE reference · third-party-advisory
- VulnCheck Advisory: Cypress Solutions CTM-200/CTM-ONE 1.3.6 Hard-coded Credentials Remote RootCVE 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.
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.