How severe is CVE-2020-27253?

CVE-2020-27253 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-27253 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27253?

CVE-2020-27253 affects Rockwellautomation Factorytalk Linx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27253?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-27253 published?

CVE-2020-27253 was published on 2020-11-26 and last updated on 2026-06-17.

CVE-2020-27253

CVE-2020-27253 is a high-severity vulnerability in Rockwellautomation Factorytalk Linx with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Rockwellautomation Factorytalk Linx
Published: 2020-11-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2020-27253?: 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.
How severe is CVE-2020-27253?: CVE-2020-27253 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-27253 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27253?: CVE-2020-27253 affects Rockwellautomation Factorytalk Linx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27253?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-27253 published?: CVE-2020-27253 was published on 2020-11-26 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-20-329-01

Affected products (1)

cpe:2.3:a:rockwellautomation:factorytalk_linx:*:*:*:*:*:*:*:*

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