Is CVE-2011-3489 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2011-3489, but active exploitation has not been confirmed.

Can CVE-2011-3489 be exploited remotely?

Yes. CVE-2011-3489 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2011-3489?

CVE-2011-3489 has a CVSS score of 5.0 (MEDIUM).

HOME VULNERABILITIESCVE-2011-3489

MEDIUMPOC

CVE-2011-3489

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

5.0

CVSS v3.1

Official Description

RnaUtility.dll in RsvcHost.exe 2.30.0.23 in Rockwell RSLogix 19 and earlier allows remote attackers to cause a denial of service (crash) via a crafted rna packet with a long string to TCP port 4446 that triggers (1) "a memset zero overflow" or (2) an out-of-bounds read, related to improper handling of a 32-bit size field.

NVD Source

Technical Analysis

CVE-2011-3489 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-2011-3489. 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.