---
title: "CVE-2019-6553: Stack-based Buffer Overflow | CubePath"
description: "A vulnerability was found in Rockwell Automation RSLinx Classic versions 4.10.00 and prior. An input validation issue in a .dll file of RSLinx Classic…"
language: en
source: https://cubepath.com/security/cve/CVE-2019-6553
---

# CVE-2019-6553: Stack-based Buffer Overflow | CubePath

## Description

A vulnerability was found in Rockwell Automation RSLinx Classic versions 4.10.00 and prior. An input validation issue in a .dll file of RSLinx Classic where the data in a Forward Open service request is passed to a fixed size buffer, allowing an attacker to exploit a stack-based buffer overflow condition.

Official description from the CVE record, published by icscert. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-6553)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.66341 (66.3% probability)

Percentile

99.3%

Scores of

Nov 10, 2026

Model

v2026.06.15

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-121](https://cwe.mitre.org/data/definitions/121.html) Stack-based Buffer Overflow

## Affected products

Products listed in the CVE record, as the CNA published them.

- Rockwell Automation RSLinx Classic

  - affected: 4.10.00 and prior

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [ics-cert.us-cert.gov/advisories/ICSA-19-064-01](https://ics-cert.us-cert.gov/advisories/ICSA-19-064-01)

## Timeline

1. ID reserved Jan 22, 2019
2. Record published Apr 4, 2019
3. Record last updated Aug 4, 2024

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:00 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)