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Fencer Vulns
high 7.5

CVE-2019-6535 json

Mitsubishi Electric MELSEC-Q Series PLCs Resource Exhaustion

published 2019-02-05 7 y ago modified 2026-06-17 4 mo 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.

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, 2026-11-08).

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 Vulns 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.