CVE-2015-3938 — The HTTP application on Mitsubishi Electric MELSEC FX3G PLC devices before April 2015 allows remote attackers to cause a denial of service (device outage) via a long parameter

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HIGH

The HTTP application on Mitsubishi Electric MELSEC FX3G PLC devices before April 2015 allows remote attackers to cause a denial of service (device outage) via a long parameter

Published Oct 3, 2015

7.8

HIGH

CVSS 2.0

EPSS 2.23%

Description

The HTTP application on Mitsubishi Electric MELSEC FX3G PLC devices before April 2015 allows remote attackers to cause a denial of service (device outage) via a long parameter.

Affected products

Remediation

No remediation recorded yet.

Metrics

2.23% 0.02230

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

EPSS probability 0.02230

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (11 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	2.23% (0.02230)	82.12th	v5 (v2026.06.15)
Jun 15, 2026	2.23% (0.02230)	80.38th	v5 (v2026.06.15)
Mar 17, 2025	0.44% (0.00437)	60.89th	v4 (v2025.03.14)
Dec 12, 2024	0.35% (0.00348)	72.57th	v3 (v2023.03.01)
Feb 8, 2024	0.35% (0.00348)	70.93th	v3 (v2023.03.01)
Jul 26, 2023	0.35% (0.00348)	67.95th	v3 (v2023.03.01)
Mar 7, 2023	0.30% (0.00300)	64.66th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Sep 17, 2022	1.05% (0.01055)	50.47th	v2 (v2022.01.01)
Apr 1, 2022	1.05% (0.01055)	48.43th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)

Weaknesses (1)

CWE-399

References (1)

https://ics-cert.us-cert.gov/advisories/ICSA-15-146-01
x_refsource_MISCThird Party AdvisoryUS Government Resource

Link	Providers	Tags
https://ics-cert.us-cert.gov/advisories/ICSA-15-146-01		x_refsource_MISCThird Party AdvisoryUS Government Resource

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner icscert

Published Oct 3, 2015

Updated Aug 6, 2024

Reserved May 12, 2015

Link CVE-2015-3938

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2015-3938

Red Hat

Severity n/a

Public date n/a

Links CVE-2015-3938