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. 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.

CVSS v4.0

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS

0.54% chance of exploitation in the next 30 days, 43th percentile

Published

2025-11-14

Updated

2026-04-07

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/50183

References

• CVE Record
• NVD entry

Related

• CVE-2021-44659
• CVE-2021-44663
• CVE-2021-44657
• CVE-2021-44664
• CVE-2021-44655
• CVE-2021-44665