CVE-2011-5009

The CmpWebServer.dll module in the Control service in 3S CoDeSys 3.4 SP4 Patch 2 allows remote...

5.0 MediumPublic exploit

The CmpWebServer.dll module in the Control service in 3S CoDeSys 3.4 SP4 Patch 2 allows remote attackers to cause a denial of service (NULL pointer dereference) via (1) a crafted Content-Length in an HTTP POST or (2) an invalid HTTP request method.

Exploit likelihood

10.4%Up 3.4 points since Feb 4, 2022

What each source reports

NVD Score used 5.0

Record: CVE-2011-5009
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-5009
Updated: 2026-11-02

EUVDEUVD-2011-4914 No score

Record: EUVD-2011-4914
Updated: 2026-11-03

GitHub AdvisoriesGHSA-8jmv-f4p4-24wg No score

The CmpWebServer.dll module in the Control service in 3S CoDeSys 3.4 SP4 Patch 2 allows remote...

Record: GHSA-8jmv-f4p4-24wg
Updated: 2026-11-02

Affected products

3ssoftware codesys

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	CoDeSys 3.4 - POST Null Pointer Content-Length Parsing Remote Denial of Service	2011-11-30
Exploit-DB	CoDeSys 3.4 - Null Pointer Invalid HTTP Request Parsing Remote Denial of Service	2011-11-30

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-5009 is a medium vulnerability (CVSS 5.0) in 3ssoftware Codesys, published December 25, 2011. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 10.4%, the 95th percentile. No source names a fixed version.