AUGUST 4, 2026
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Case File

CVE-2021-4466

UNKNOWN · CVSS N/A EPSS 0.53% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-11-14 · Last synced 2026-08-04

CyberRota Analysis

This vulnerability has an unknown severity rating. Public exploit code or proof-of-concept references have been detected in its references. It may be remotely exploitable. Exploitation may require the attacker to be authenticated.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
remote code execution code execution
External Security References

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-4466
Severity
UNKNOWN
CVSS
N/A
EPSS
0.53%

Original NVD Description

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.