CVE-2017-7898 — An Improper Restriction of Excessive Authentication Attempts issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions

Back Back to CVE browser

CRITICAL

An Improper Restriction of Excessive Authentication Attempts issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions

Published Jun 30, 2017

9.8

CRITICAL

CVSS 3.1

EPSS 5.15%

Description

An Improper Restriction of Excessive Authentication Attempts issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. There are no penalties for repeatedly entering incorrect passwords.

Affected products

Vendor n/a Product Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 Default
n/a
- Version
  Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

n/a

Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400

n/a

Version	Status	Constraints
Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400	affected	-

Remediation

No remediation recorded yet.

Metrics

5.15% 0.05152

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.05152

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v5

Table of values (13 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	5.15% (0.05152)	92.17th	v5 (v2026.06.15)
Jun 15, 2026	5.11% (0.05110)	91.25th	v5 (v2026.06.15)
Jul 20, 2024	0.06% (0.00058)	24.64th	v3 (v2023.03.01)
Jun 13, 2024	0.06% (0.00058)	24.09th	v3 (v2023.03.01)
Mar 7, 2023	0.06% (0.00058)	22.04th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Sep 10, 2022	0.89% (0.00885)	26.24th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00885)	24.24th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00885)	10.50th	v2 (v2022.01.01)
Feb 3, 2022	0.62% (0.00624)	17.80th	v1
Jan 6, 2022	0.62% (0.00624)	17.24th	v1
Sep 1, 2021	0.62% (0.00624)	45.04th	v1
Apr 14, 2021	0.62% (0.00624)	0.00th	v1

Weaknesses (1)

CWE-307

References (2)

http://www.securitytracker.com/id/1038546
vdb-entryx_refsource_SECTRACK
https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04
x_refsource_MISCPatchThird Party AdvisoryUS Government Resource

Link	Providers	Tags
http://www.securitytracker.com/id/1038546		vdb-entryx_refsource_SECTRACK
https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04		x_refsource_MISCPatchThird Party AdvisoryUS Government Resource

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner icscert

Published Jun 30, 2017

Updated Jun 3, 2026

Reserved Apr 18, 2017

Link CVE-2017-7898

CISA Vulnrichment

Updated Jun 3, 2026

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2017-7898

Red Hat

Severity n/a

Public date n/a

Links CVE-2017-7898