vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
Priority CRITICAL 86CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.
Summary
vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
Why it matters now
EPSS 0.96184 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| vsftpd | vsftpd | 2.3.4 downloaded between 20110630 and 20110703 | — | No fix listed | CNA |
- vsftpd Vendorvsftpd Affected 2.3.4 downloaded between 20110630 and 20110703 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:vsftpd_project:vsftpd:2.3.4:*:*:*:*:*:*:* | 2.3.4 | Vulnerable | Vsftpd Project |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
- cpe:2.3:a:vsftpd_project:vsftpd:2.3.4:*:*:*:*:*:*:* Versions 2.3.4 Vulnerable ·Vsftpd Project
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2011-2523
- 2026-10-03 Alias added: GHSA-qf3g-hgw2-8r8h
References
Advisory 4
More vsftpd vulnerabilities
- TI-2026-83032 Authentication bypass in vsftpd lets attackers hijack FTPS data channels CVSS 4.0CRITICAL 9.1
- TI-2026-83031 Access control bypass in vsftpd lets FTP users run denied commands CVSS 4.0LOW 2.3
Sources
- CVE-2011-2523 · CVE Program
- CVE-2011-2523 · NVD
- FIRST EPSS
- GHSA-qf3g-hgw2-8r8h · GitHub Advisory Database · CC BY 4.0
- CVE-2011-2523 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences