CVE-2011-3486

medium

Published 2011-09-16 · Modified 2026-04-29

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

—

CVSS v4 NEW

—

not yet in upstream

VIR risk

6.0

Description

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.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-17835 dos windows verified

Luigi Auriemma · 2011-09-14

Beckhoff TwinCAT 2.11.0.2004 - Denial of Service

Source code queued for fetch — refresh in a moment.

Metasploit modules

auxiliary_dos/scada/beckhoff_twincat rank 300

Beckhoff TwinCAT SCADA PLC 2.11.0.2004 DoS

Source fetch failed: fetch_error — view the original via the link above.

Application impact

Vendor	Product	Versions
beckhoff	twincat	`{"endIncluding":"2.11.0.2004"}`
beckhoff	twincat	`2.7`
beckhoff	twincat	`2.8`
beckhoff	twincat	`2.9`
beckhoff	twincat	`2.10`

References

CWEs

CWE-119

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.