CVE-2009-20011Public exploitNetwork attack vector

Unauthenticated command execution via mimencode file write

Published Aug 30, 2025 · Updated May 15, 2026

Unrestricted file upload in ContentKeeper Web Appliance before 125.10 allows remote attackers to execute commands through mimencode CGI. The exposed /cgi-bin/ck/mimencode handler accepts a POST-selected filename and writes attacker-controlled, executable content beneath the CGI path without authentication. Access to the appliance management address is required; commands initially run as Apache, while benetool's unsafe PATH lookup allows escalation to root.

CVSS severity10.0
Critical
EPSS probability1.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in ContentKeeper Web Appliance before 125.10 allows remote attackers to execute commands through mimencode CGI. The exposed /cgi-bin/ck/mimencode handler accepts a POST-selected filename and writes attacker-controlled, executable content beneath the CGI path without authentication. Access to the appliance management address is required; commands initially run as Apache, while benetool's unsafe PATH lookup allows escalation to root.

The record

CVE
CVE-2009-20011
Published
Aug 30, 2025
Updated
May 15, 2026
Vendor
ContentKeeper Technologies
Product
ContentKeeper Web Appliance
Classifications
CWE-78, CWE-434, CAPEC-88, CAPEC-233, T1190, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 30, 2025CVE publishedPublication date reported by the CVE source.
  2. May 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <125.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ContentKeeper Technologies · ContentKeeper Web Applianceversion=0 <125.10

Published CVSS scores

10.0VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-88OS Command Injection
CAPEC-233Privilege Escalation
T1190Exploit Public-Facing Application
T1068Exploitation for Privilege Escalation

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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