How severe is CVE-2016-8370?

CVE-2016-8370 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2016-8370 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-8370?

CVE-2016-8370 primarily affects Mitsubishielectric Qj71e71-100 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-8370?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-8370 published?

CVE-2016-8370 was published on 2017-02-13 and last updated on 2026-06-17.

CVE-2016-8370

CVE-2016-8370 is a high-severity vulnerability in Mitsubishielectric Qj71e71-100 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-327.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-327
Affected product: Mitsubishielectric Qj71e71-100 Firmware
Published: 2017-02-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2016-8370?: 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.
How severe is CVE-2016-8370?: CVE-2016-8370 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2016-8370 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-8370?: CVE-2016-8370 primarily affects Mitsubishielectric Qj71e71-100 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-8370?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-8370 published?: CVE-2016-8370 was published on 2017-02-13 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:mitsubishielectric:qj71e71-100_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:qj71e71-b5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:qj71e71-b2_firmware:-:*:*:*:*:*:*:*

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