CVE-2011-3486

mediumpriority · attend · 47EPSS 0.496 · 99 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · functional

Likely / severe?

49.6% (99th) EPSS

CVSS 5 · medium

Is it mine?

8 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-28

Beckhoff TwinCAT 2.11.0.2004 and earlier allows remote attackers to cause a denial of service via a crafted request to UDP port 48899, which triggers an out-of-bounds read.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationTwinCATcisa_csaf_ot
If the user is unable to apply the patch, Beckhoff recommends that users deploy a firewall and restrict traffic on the affected port (48899\UDP).

cvss

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Psecondary · CISA US

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimaryCWE-119US

exploits (2)

Public proof-of-concept and weaponised exploit code.

EDB-17835Beckhoff TwinCAT 2.11.0.2004 - Denial of Servicefunctional · exploit_db
auxiliary/dos/scada/beckhoff_twincatBeckhoff TwinCAT SCADA PLC 2.11.0.2004 DoSfunctional · metasploit

affected products (8)

Products and version ranges known to be affected.

Beckhoff TwinCAT: 2.10|2.11|2.11R2all versionscisa_csaf_otUS
Beckhoff TwinCAT≤ 2.10|2.11|2.11R2cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
beckhoff twincat≤ 2.11.0.2004nvdUScpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:*
beckhoff twincat= 2.10nvdUScpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:*
beckhoff twincat= 2.7nvdUScpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:*
beckhoff twincat= 2.8nvdUScpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:*
beckhoff twincat= 2.9nvdUScpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-11-279-04Beckhoff TwinCAT Read Access Violation2011-07-09icsa · cisa_csaf_otUS
This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2011-09-16modified 2026-06-16

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+21039 more

references (12)

External citations — patches, advisories, analysis.

scry

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