CVE-2020-6111
mediumpriority · track · 32EPSS 0.056 · 93 %ileEURUUSEPSS · scored 2026-10-27
An exploitable denial-of-service vulnerability exists in the IPv4 functionality of Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 16.000, Series B FRN 15.002, Series B FRN 15.000, Series B FRN 14.000, Series B FRN 13.000, Series B FRN 12.000, Series B FRN 11.000 and Series B FRN 10.000. A specially crafted packet can cause a major error, resulting in a denial of service. An attacker can send a malicious packet to trigger this vulnerability.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationAllen-Bradley MicroLogix 1100cisa_csaf_ot
Consult the product documentation for specific features, such as a hardware key mode setting, to which may be used to block unauthorized changes, etc.
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 · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (18)
Products and version ranges known to be affected.
- n/a Allen-Bradley≤ Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 10.000, Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 11.000, Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 12.000, Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 13.000, Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 14.000, Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 15.000, Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 15.002, Allen-Bradley MicroLogix 1100 Programmable Logic Controller Systems Series B FRN 16.000enisa_euvdEU
- rockwellautomation micrologix 1100 b firmware= 10.000nvdUScpe:2.3:o:rockwellautomation:micrologix_1100_b_firmware:*:*:*:*:*:*:*:*
- rockwellautomation micrologix 1100 b firmware= 11.000nvdUScpe:2.3:o:rockwellautomation:micrologix_1100_b_firmware:*:*:*:*:*:*:*:*
- rockwellautomation micrologix 1100 b firmware= 12.000nvdUScpe:2.3:o:rockwellautomation:micrologix_1100_b_firmware:*:*:*:*:*:*:*:*
- rockwellautomation micrologix 1100 b firmware= 13.000nvdUScpe:2.3:o:rockwellautomation:micrologix_1100_b_firmware:*:*:*:*:*:*:*:*
- rockwellautomation micrologix 1100 b firmware= 14.000nvdUScpe:2.3:o:rockwellautomation:micrologix_1100_b_firmware:*:*:*:*:*:*:*:*
- rockwellautomation micrologix 1100 b firmware= 15.000nvdUScpe:2.3:o:rockwellautomation:micrologix_1100_b_firmware:*:*:*:*:*:*:*:*
- rockwellautomation micrologix 1100 b firmware= 15.002nvdUScpe:2.3:o:rockwellautomation:micrologix_1100_b_firmware:*:*:*:*:*:*:*:*
- rockwellautomation micrologix 1100 b firmware= 16.000nvdUScpe:2.3:o:rockwellautomation:micrologix_1100_b_firmware:*:*:*:*:*:*:*:*
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-21-047-02Rockwell Automation Allen-Bradley Micrologix 11002021-02-16icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could result in denial-of-service conditions.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2020-6111cnnvd
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1057cnnvd
- https://us-cert.cisa.gov/ics/advisories/icsa-21-047-02cnnvd
- https://www.auscert.org.au/bulletins/ESB-2021.0591cnnvd
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1057enisa_euvd
- https://us-cert.cisa.gov/ics/advisories/icsa-21-047-02enisa_euvd
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1057Third Party Advisorynvd
- https://us-cert.cisa.gov/ics/advisories/icsa-21-047-02Third Party AdvisoryUS Government Resourcenvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan