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…

published 2015-10-28 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-6433

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 6.1%; EPSS 6.1% chance of exploitation in 30 days, percentile 93%
public exploits: 0; none known

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.

Patch / fix

links 1

ics-cert.us-cert.gov/advisories/ICSA-15-300-03 advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-15-300-03A updated 2025-06-09 cvss 7.5

Rockwell Automation Micrologix 1100 and 1400 PLC Systems Vulnerabilities (Update A)

Rockwell Micrologix 1100 PLC Series A, B <=14.000 Rockwell Micrologix 1400 PLC Series A, B <=15.002
affected: mitigation “Update to the latest versions. (http://infiniteautomation.com/index.php/download)”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 5 mo ago (2026-06-03)

Exploit prediction

6.09% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	7.8	AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

ics-cert.us-cert.gov /advisories/ICSA-15-300-03
patch, third-party-advisory, us-government-resource

Sources

CVE List CVE-2015-6492
NVD CVE-2015-6492

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary