CVE-2020-9436Public exploitNetwork attack vector

Operating system compromise via uploaded filename injection

Published Mar 12, 2020 · Updated Aug 4, 2024

Command injection in Phoenix Contact TC ROUTER and TC CLOUD CLIENT firmware allows remote authenticated users to compromise the device OS. The /cgi-bin/p/adm/cfg configuration-upload CGI passes a client-supplied XML filename containing shell metacharacters to system command processing instead of enforcing server-side validation. Administrative web-interface credentials are required; a crafted multipart POST request bypasses client-side filtering and executes arbitrary commands on the underlying device.

CVSS severity7.2
High
EPSS probability2.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Phoenix Contact TC ROUTER and TC CLOUD CLIENT firmware allows remote authenticated users to compromise the device OS. The /cgi-bin/p/adm/cfg configuration-upload CGI passes a client-supplied XML filename containing shell metacharacters to system command processing instead of enforcing server-side validation. Administrative web-interface credentials are required; a crafted multipart POST request bypasses client-side filtering and executes arbitrary commands on the underlying device.

The record

CVE
CVE-2020-9436
Published
Mar 12, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 12, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C
7.2Phoenix ContactCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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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