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Vulnerability record · CVE-2015-6492 · published 28 October 2015

CVE-2015-6492: Rockwellautomation micrologix 1100 firmware memory buffer overflow vulnerability

Rockwellautomation · Micrologix 1100 Firmware

Allen-Bradley MicroLogix 1100 devices before B FRN 15.000 and 1400 devices before B FRN 15.003 allow remote attackers to cause a denial of service (memory corruption and device crash) via a crafted HTTP request.

7.5 CVSS 3.1 High EPSS 4.5% · top 8.9% CWE-119 · Memory buffer overflow
7.5CVSS 3.1 base score, v2 7.8
4.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Allen-Bradley MicroLogix 1100 devices before B FRN 15.000 and 1400 devices before B FRN 15.003 allow remote attackers to cause a denial of service (memory corruption and device crash) via a crafted HTTP request.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://ics-cert.us-cert.gov/advisories/ICSA-15-300-03 PatchThird Party AdvisoryUS Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-15-300-03 PatchThird Party AdvisoryUS Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-6990Rockwellautomation micrologix 1400 a firmware hard-coded credentials vulnerabilityRockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix…EPSS 4.4%9.8CVE-2015-6490Rockwellautomation micrologix 1100 firmware memory buffer overflow vulnerabilityStack-based buffer overflow on Allen-Bradley MicroLogix 1100 devices before B FRN 15.000 and 1400 devices through B FRN 15.003 allows remote attacker…EPSS 7.0%8.6CVE-2021-33012Rockwellautomation micrologix 1100 firmware improper input validation vulnerabilityRockwell Automation MicroLogix 1100, all versions, allows a remote, unauthenticated attacker sending specially crafted commands to cause the PLC to f…EPSS 2.6%8.6CVE-2021-22659Rockwellautomation micrologix 1400 firmware classic buffer overflow vulnerabilityRockwell Automation MicroLogix 1400 Version 21.6 and below may allow a remote unauthenticated attacker to send a specially crafted Modbus packet allo…EPSS 1.7%8.6CVE-2018-17924Rockwellautomation micrologix 1400 firmware missing authentication for critical function vulnerabilityRockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules An unauthenticated, remote threat actor could send a CIP…EPSS 4.3%7.5CVE-2022-3166Rockwellautomation micrologix 1100 firmware vulnerabilityRockwell Automation was made aware that the webservers of the Micrologix 1100 and 1400 controllers contain a vulnerability that may lead to a denial-…EPSS 0.70%7.5CVE-2021-32926Rockwellautomation micro800 firmware vulnerabilityWhen an authenticated password change request takes place, this vulnerability could allow the attacker to intercept the message that includes the leg…EPSS 3.0%7.5CVE-2020-6984Rockwellautomation micrologix 1400 a firmware broken cryptographic algorithm vulnerabilityRockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix…EPSS 2.8%

Source: NIST National Vulnerability Database (record CVE-2015-6492), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.