Is CVE-2011-3486 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2011-3486, but active exploitation has not been confirmed.

Can CVE-2011-3486 be exploited remotely?

Yes. CVE-2011-3486 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2011-3486?

CVE-2011-3486 has a CVSS score of 5.0 (MEDIUM).

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MEDIUMPOC

CVE-2011-3486

CWE-119Published: September 16, 2011· Updated: Jun 16, 2026

5.0

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2011-3486 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2011-3486. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.