No exploitation reported

CVE-2016-8370

No exploitation reported by the sources we read.

Published2017-02-13
WeaknessCWE-327

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered in Mitsubishi Electric Automation MELSEC-Q series Ethernet interface modules QJ71E71-100, all versions, QJ71E71-B5, all versions, and QJ71E71-B2, all versions. Weakly encrypted passwords are transmitted to a MELSEC-Q PLC.

Timeline

dates in UTC

2017-02-1321:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-8370?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-8370?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Mitsubishielectric qj71e71-100 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Mitsubishielectric qj71e71-b2 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Mitsubishielectric qj71e71-b5 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-16-336-03 CISA3 known affected
Mitsubishi Electric MELSEC-Q Series Ethernet Interface Module Vulnerabilities
Mitsubishi Electric QJ71E71-100: vers:all/* · Mitsubishi Electric QJ71E71-B5: vers:all/* · Mitsubishi Electric QJ71E71-B2: vers:all/*

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-16-336-03 · 3 productsMitsubishi Electric has released a product revision for newer devices with serial numbers 18072 and later to implement IP filtering for the QJ71E71-100, QJ71E71-B5, and QJ71E71-B2 Ethernet interface modules. Mitsubishi Electric reports that the IP filter function improves access prevention from ext…
Mitigation from the vendor CISA ICSA-16-336-03 · 3 productshowever, the IP filter function does not completely prevent unauthorized access. Additional measures to encrypt communications pathway are required, such as IPsec. The cryptographic algorithm vulnerability will not be addressed.
Mitigation from the vendor CISA ICSA-16-336-03 · 3 productsAdditional information about the vulnerabilities or Mitsubishi Electric’s compensating control is available by contacting a local Mitsubishi representative, which can be found at the following location: (https://us.mitsubishielectric.com/fa/en/about-us/distributors)
Mitigation from the vendor CISA ICSA-16-336-03 · 3 productsMitsubishi Electric strongly recommends that users should operate the affected device behind a firewall.

Advisories and patches

ics-cert.us-cert.govMitigation

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-327read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2017-02-13
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-8370?

Is CVE-2016-8370 actively exploited?

Active exploitation of CVE-2016-8370 has not been confirmed. Its EPSS score was 1.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-8370?

CVE-2016-8370 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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