Rockwell Automation RSLinx Classic Versions 4.00.01 and prior.

published 2018-09-20 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6713

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 16.1%; EPSS 16.1% chance of exploitation in 30 days, percentile 96%
public exploits: 0; none known

Rockwell Automation RSLinx Classic Versions 4.00.01 and prior. This vulnerability may allow a remote threat actor to intentionally send a malformed CIP packet to Port 44818, causing the software application to stop responding and crash. This vulnerability also has the potential to exploit a buffer overflow condition, which may allow the threat actor to remotely execute arbitrary code.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-263-02 updated 2018-09-20 cvss 10.0

Rockwell Automation RSLinx Classic

Rockwell Automation RSLinx Classic <= 4.00.01
affected: mitigation “Rockwell Automation has released a new version of the software that can found at Rockwell Automation knowledgebase article KB 1075712” rockwellautomation.custhelp.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

16.09% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

tenable.com https://www.tenable.com/security/research/tra-2018-26 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Rockwell Automation RSLinx Classic

Classification

Weakness

CWE-121 Stack-based Buffer Overflow
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

tenable.com /security/research/tra-2018-26
exploit, third-party-advisory
ics-cert.us-cert.gov /advisories/ICSA-18-263-02
third-party-advisory, us-government-resource

Sources

CVE List CVE-2018-14829
NVD CVE-2018-14829

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary