Stack-based buffer overflow on Allen-Bradley MicroLogix 1100 devices before B FRN 15.000 and 1400 devices through B FRN 15.003 allows remot…

published 2015-10-28 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-6431

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 9.5%; EPSS 9.5% chance of exploitation in 30 days, percentile 95%
public exploits: 0; none known

Stack-based buffer overflow on Allen-Bradley MicroLogix 1100 devices before B FRN 15.000 and 1400 devices through B FRN 15.003 allows remote attackers to execute arbitrary code via unspecified vectors.

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 9.8

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: total
Assessed: 5 mo ago (2026-06-03)

Exploit prediction

9.51% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-121 Stack-based Buffer Overflow
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-2015-6490
NVD CVE-2015-6490

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