CVE-2020-6087
highpriority · track · 31EPSS 0.043 · 91 %ileEUUSEPSS · scored 2026-10-28
An exploitable denial of service vulnerability exists in the ENIP Request Path Data Segment functionality of Allen-Bradley Flex IO 1794-AENT/B. 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 If the ANSI Extended Symbol Segment Sub-Type is supplied, the device treats the byte following as the Data Size in words. When this value represents a size greater than what remains in the packet data, the device enters a fault state where communication with the device is lost and a physical power cycle is required.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
- rockwellautomation flex i/o 1794-aent/b firmware= 4.003nvdUScpe:2.3:o:rockwellautomation:flex_i\/o_1794-aent\/b_firmware:*:*:*:*:*:*:*:*
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2020-6087cnnvd
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1007cnnvd
- https://us-cert.cisa.gov/ics/advisories/icsa-20-294-01cnnvd
- https://www.auscert.org.au/bulletins/ESB-2020.3622/cnnvd
- https://www.rockwellautomation.com/en-us.htmlPatchcnnvd
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1007enisa_euvd
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1007ExploitThird Party Advisorynvd
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