CVE-2011-2523: Debian Linux

Critical severity, CVSS 9.8. EPSS: 96.2% chance of exploitation in the next 30 days.

vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Vsftpd Project Vsftpd: version 2.3.4 only

Published 2019-11-27. Last modified 2026-06-16.