Vulnerability record · CVE-2018-14821 · published 20 September 2018

CVE-2018-14821: Rockwellautomation rslinx heap-based buffer overflow vulnerability

Rockwellautomation · Rslinx

Rockwell Automation RSLinx Classic Versions 4.00.01 and prior. This vulnerability may allow a remote, unauthenticated threat actor to intentionally send a malformed CIP packet to Port 44818, causing the RSLinx Classic application to terminate. The user will need to manually restart the software to regain functionality.

7.5 CVSS 3.0 High EPSS 4.5% · top 8.8% CWE-122 · Heap-based buffer overflowCWE-119 · Memory buffer overflow

7.5CVSS 3.0 base score, v2 5.0

4.5%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Rslinx Rockwellautomation

References

Link	Tags
https://ics-cert.us-cert.gov/advisories/ICSA-18-263-02	Third Party AdvisoryUS Government Resource
https://www.tenable.com/security/research/tra-2018-26	ExploitThird Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-18-263-02	Third Party AdvisoryUS Government Resource
https://www.tenable.com/security/research/tra-2018-26	ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-14821), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.