Security readout for executives and security teams
CVE-2017-7901 affects Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 PLCs. The devices may generate TCP sequence numbers that can be guessed from earlier values. A reachable attacker could spoof or disrupt TCP connections and cause denial of service. The supplied sources do not cite active exploitation or a specific fix. Exposure is mainly OT networks using the listed MicroLogix 1100 or 1400 PLC models at Version 16.00 or earlier. Risk rises where PLC network services are reachable from untrusted users, flat plant networks, remote access paths, or poorly segmented corporate networks. Treat this as a moderate OT availability risk. It is not described as code execution or data theft, but PLC denial of service can affect operations. Prioritize asset identification, segmentation review, and vendor guidance checks, especially for exposed or safety-relevant production environments. Mitigation focus: Inventory MicroLogix 1100 and 1400 PLCs and record exact model, series, and firmware.; Check Rockwell Automation and CISA ICS guidance for supported firmware or compensating controls.; Restrict PLC access to trusted engineering hosts and required control-network paths..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
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Predictable Value Range from Previous Values
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