THREATPORT/VULNERABILITY/CVE-2019-10977
HIGH SEVERITY

CVE-2019-10977

Qj71e71 100 Firmware vulnerability

CVSS
7.5
EPSS
3.5%
EPSS pct
88th
Exploited
No known
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.
Affected vendor
Mitsubishielectric
Affected product
Qj71e71 100 Firmware
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
Published
2019-05-23

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2019-10977

  • Confirm whether Mitsubishielectric Qj71e71 100 Firmware is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-10977.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-10977

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-10977 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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