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Fencer Intel
high 7.5

CVE-2019-6535 json

Mitsubishi Electric MELSEC-Q Series PLCs Resource Exhaustion

published 7y ago modified 4mo ago also EUVD-2019-16094

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
4.3%
EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Mitsubishi Electric Q03/04/06/13/26UDVCPU: serial number 20081 and prior, Q04/06/13/26UDPVCPU: serial number 20081 and prior, and Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU: serial number 20101 and prior. A remote attacker can send specific bytes over Port 5007 that will result in an Ethernet stack crash and disruption to USB communication.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-19-029-02 updated cvss 7.5

Mitsubishi Electric MELSEC-Q Series PLCs

  • Mitsubishi Electric Q03/04/06/13/26UDVCPU <=serial_number_20081 Mitsubishi Electric Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU <=serial_number_20101 Mitsubishi Electric Q04/06/13/26UDPVCPU <=serial_number_20081
    affected: mitigation “Mitsubishi Electric strongly recommends that users should operate the affected device behind a firewall.” us.mitsubishielectric.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

4.27% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Mitsubishi Electric Q03/04/06/13/26UDVCPU
  • Mitsubishi Electric Q04/06/13/26UDPVCPU
  • Mitsubishi Electric Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.