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Vulnerabilities

Vulnerability · CVE-2021-4466

IPCop versions up to and including 2.1.9 contain an authenticated remote code execution vulnerability within the web-based administration interface.

Published Nov 14, 2025 · catalog updated Apr 7, 2026 · IPCop Project IPCop

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2021-4466. EPSS is 0.58%. Act only if a listed version of IPCop Project IPCop is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.58%
Remediation
Vendor / distro source
Affected products
vendor IPCop Project IPCop 0 ≤2.1.9

IPCop versions up to and including 2.1.9 contain an authenticated remote code execution vulnerability within the web-based administration interface. The email configuration component inserts user-controlled values, including the EMAIL_PW parameter, directly into system-level operations without proper input sanitation. By modifying the email password field to include shell metacharacters and issuing a save-and-test-mail action, an authenticated attacker can execute arbitrary operating system commands with the privileges of the web interface, resulting in full system compromise.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor IPCop Project IPCop 0 ≤2.1.90 ≤2.1.9

How to fix CVE-2021-4466

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-4466. EPSS is 0.58%. Act only if a listed version of IPCop Project IPCop is installed.

Which versions are affected?

Compare what you have installed with IPCop Project IPCop 0 ≤2.1.9 0 ≤2.1.9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.58%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 14, 2025 · EUVD

    Detected

    IPCop versions up to and including 2.1.9 contain an authenticated remote code execution vulnerability within the web-based administration interface. The email configuration component inserts user-controlled values, including the EMAIL_PW parameter, directly into system-level operations without proper input sanitation. By modifying the email password field to include shell metacharacters and issuin

  2. Apr 7, 2026 · EUVD

    Updated

    IPCop versions up to and including 2.1.9 contain an authenticated remote code execution vulnerability within the web-based administration interface. The email configuration component inserts user-controlled values, including the EMAIL_PW parameter, directly into system-level operations without proper input sanitation. By modifying the email password field to include shell metacharacters and issuin

Sources

  • CVE.orgVulnerability recordCVE-2021-4466

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-4466

    30-day exploitation probability 0.58%

    first.org
  • EUVDVulnerability recordEUVD-2021-34717

    IPCop versions up to and including 2.1.9 contain an authenticated remote code execution vulnerability within the web-based administration interface. The email configuration component inserts user-controlled values, including the EMAIL_PW parameter, directly into system-level oper

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 2, 2026
  • CVE.orgOct 24, 2026
  • EUVDOct 24, 2026