CVE-2019-10977

highpriority · track · 31EPSS 0.035 · 89 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

3.54% (89th) EPSS

CVSS 7.8 · high

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

In Mitsubishi Electric MELSEC-Q series Ethernet module QJ71E71-100 serial number 20121 and prior, an attacker could send crafted TCP packets against the FTP service, forcing the target devices to enter an error mode and cause a denial-of-service condition.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedQJ71E71-100cisa_csaf_ot
Mitsubishi Electric has released new firmware Version 20122 for the QJ71E71-100 Ethernet module to mitigate the reported vulnerability.
MitigationQJ71E71-100cisa_csaf_ot
Mitsubishi Electric strongly recommends that users should operate the affected device behind a firewall.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-755USprimaryCWE-400USCWE-400US

affected products (4)

Products and version ranges known to be affected.

QJ71E71-100: serial number 20121 and priorall versionscisa_csaf_otUS
Mitsubishi Electric QJ71E71-100≤ 20121cisa_csaf_otUS
Mitsubishi Electric MELSEC-Q series Ethernet module≤ QJ71E71-100 serial number 20121 and priorenisa_euvdEU
mitsubishielectric qj71e71-100 firmware≤ 20121nvdUScpe:2.3:o:mitsubishielectric:qj71e71-100_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-19-141-02Mitsubishi Electric MELSEC-Q Series Ethernet Module2019-05-21icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability may render the device unresponsive, requiring a physical reset of the PLC (Programmable Logic Controller).

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2019-05-23modified 2026-06-17

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+700 more

references (11)

External citations — patches, advisories, analysis.

scry

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