A flaw exists in the Ingress/Egress checks routine of FactoryTalk Linx Version 6.11 and prior.

published 2020-11-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-19766

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.9%; EPSS 1.9% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

A flaw exists in the Ingress/Egress checks routine of FactoryTalk Linx Version 6.11 and prior. This vulnerability could allow a remote, unauthenticated attacker to specifically craft a malicious packet resulting in a denial-of-service condition on the device.

Vendor advisories

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

cisa ICSA-20-329-01 updated 2020-11-24 cvss 8.6

Rockwell Automation FactoryTalk Linx

Rockwell Automation FactoryTalk Linx <= 6.11
affected: vendor fix, mitigation “Run all software as “user” (not as “administrator”) to minimize the impact of malicious code on the infected system.” 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

1.92% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	7.8	AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

n/a FactoryTalk Linx

Classification

Weakness

CWE-20 Improper Input Validation

References

us-cert.cisa.gov /ics/advisories/icsa-20-329-01
third-party-advisory, us-government-resource

Sources

CVE List CVE-2020-27253
NVD CVE-2020-27253

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