Is CVE-2009-5011 being actively exploited?

CVE-2009-5011 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-5011?

CVE-2009-5011 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2009-5011

MEDIUM · CVSS 4.3EPSS 0.9%EU EUVD

Race condition in the FTPHandler class in ftpserver.py in pyftpdlib before 0.5.2 allows remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the getpeername function having an ENOTCONN error, a different vulnerability than CVE-2010-3494.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-362
EPSS score: 0.9% (60th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2010-0026)
Published: October 19, 2010
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2010-0026 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.

View on the EU Vulnerability Database

Affected products

g.rodola / pyftpdlib
g.rodola / pyftpdlib
g.rodola / pyftpdlib
g.rodola / pyftpdlib
g.rodola / pyftpdlib
g.rodola / pyftpdlib
g.rodola / pyftpdlib

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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