Security readout for executives and security teams
Plain-English summary
CVE-2021-47745 affects Cypress Solutions CTM-200 firmware 2.7.1. An attacker with valid access could abuse the firmware upgrade function to run operating-system commands as root. This can lead to full device compromise. Public exploit information is referenced, but the provided sources do not show confirmed active exploitation.
Executive priority
Treat as a high-priority infrastructure risk if CTM-200 2.7.1 is deployed. Root compromise of network-connected equipment can affect availability, integrity, and monitoring trust. Prioritize inventory, access restriction, and vendor-confirmed remediation.
Technical view
The issue is an authenticated OS command injection (CWE-78) in the CTM-200 firmware upgrade script, ctm-config-upgrade.sh. The vulnerable input is the fw_url parameter, which can allow arbitrary shell command execution with root privileges. CVSS v3.1 is 8.8: network-reachable, low complexity, low privileges required, no user interaction.
Likely exposure
Exposure is limited to Cypress Solutions CTM-200 devices running firmware 2.7.1, especially where management functions are reachable over untrusted networks. Devices not running 2.7.1 are not identified as affected in the provided CVE data.
Exploitation context
The vulnerability requires authentication but can provide root-level command execution after access is obtained. Exploit-DB is listed as a public exploit reference. CISA KEV status is false in the provided bundle, and no cited source confirms active exploitation.
Researcher notes
Provided sources identify the vulnerable parameter and root command-execution impact, but do not provide a confirmed vendor fix in the bundle. Avoid assuming broader product impact beyond CTM-200 2.7.1. Publication metadata appears later than the 2021 CVE year, so validate against vendor records during triage.
Mitigation direction
- Identify CTM-200 devices and prioritize any running firmware 2.7.1.
- Check Cypress guidance for fixed firmware or official mitigation instructions.
- Restrict management access to trusted administrative networks only.
- Review and rotate credentials for CTM-200 administrative accounts.
- Monitor affected devices for unusual firmware-upgrade activity or unexpected configuration changes.
Validation and detection
- Inventory Cypress CTM-200 devices and record firmware versions.
- Confirm whether firmware version 2.7.1 is present.
- Verify management interfaces are not exposed to untrusted networks.
- Review logs for suspicious firmware upgrade requests or administrative sessions.
- Document vendor guidance, available updates, and remediation status.
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-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter 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 lookupCVE-2021-47745 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50408CVE reference · exploit
- Cypress Solutions Product HomepageCVE reference · product
- Zero Science Lab Disclosure (ZSL-2021-5687)CVE reference · third-party-advisory
- VulnCheck Advisory: Cypress Solutions CTM-200 2.7.1 Root Remote OS Command Injection via Firmware UpgradeCVE 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.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.