TI-2020-04951 Aliases CVE-2020-6084 GHSA-8jr7-f4h9-8mjr

Buffer overflow in Allen-Bradley

MEDIUM 40CWE-120Published 2020-10-19 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

An exploitable denial of service vulnerability exists in the ENIP Request Path Logical Segment functionality of Allen-Bradley Flex IO 1794-AENT/B 4.003. A specially crafted network request can cause a loss of communications with the device resulting in denial-of-service. An attacker can send a malicious packet to trigger this vulnerability by sending an Electronic Key Segment with less bytes than required by the Key Format Table.

Why it matters now

EPSS 0.04263 91st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	Allen-Bradley	Allen-Bradley Flex IO 1794-AENT/B 4.003	—	No fix listed	CNA

Allen-Bradley Vendor— Affected Allen-Bradley Flex IO 1794-AENT/B 4.003 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:rockwellautomation:flex_i\/o_1794-aent:4.003:::::::*	4.003	Vulnerable	Rockwell
cpe:2.3:h:rockwellautomation:flex_i\/o_1794-aent:-:::::::*	not specified by NVD	Running on	Rockwell

cpe:2.3:o:rockwellautomation:flex_i\/o_1794-aent:4.003:*:*:*:*:*:*:* Versions 4.003 Vulnerable ·Rockwell
cpe:2.3:h:rockwellautomation:flex_i\/o_1794-aent:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-6084
2026-10-03 Alias added: GHSA-8jr7-f4h9-8mjr

References

Exploit 1

https://talosintelligence.com/vulnerability_reports/TALOS-2020-1006

TI-2020-04952 Buffer overflow in Allen Bradley CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences