CVE-2021-47745Public exploitNetwork attack vector

Root command execution via unsanitized firmware URL

Published Dec 31, 2025 · Updated Dec 31, 2025

OS command injection in Cypress Solutions CTM-200 2.7.1 allows remote authenticated users to execute shell commands as root. The ctm-config-upgrade.sh firmware-upgrade handler passes the fw_url POST value through cmd upgradefw into cmdmain, which builds a wget command with sprintf and executes it through ctmsys without neutralizing shell metacharacters. Access to the HTTP management interface and valid credentials are required; successful exploitation grants root-level control of the gateway's Linux operating system.

CVSS severity8.6
High
EPSS probability1.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Cypress Solutions CTM-200 2.7.1 allows remote authenticated users to execute shell commands as root. The ctm-config-upgrade.sh firmware-upgrade handler passes the fw_url POST value through cmd upgradefw into cmdmain, which builds a wget command with sprintf and executes it through ctmsys without neutralizing shell metacharacters. Access to the HTTP management interface and valid credentials are required; successful exploitation grants root-level control of the gateway's Linux operating system.

The record

CVE
CVE-2021-47745
Published
Dec 31, 2025
Updated
Dec 31, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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