CVE-2019-13555

mediumpriority · track · 25EPSS 0.015 · 74 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.52% (74th) EPSS

CVSS 4.3 · medium

Is it mine?

23 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 Q03/04/06/13/26UDVCPU: serial number 21081 and prior, Q04/06/13/26UDPVCPU: serial number 21081 and prior, and Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU: serial number 21081 and prior, MELSEC-L Series L02/06/26CPU, L26CPU-BT: serial number 21101 and prior, L02/06/26CPU-P, L26CPU-PBT: serial number 21101 and prior, and L02/06/26CPU-CM, L26CPU-BT-CM: serial number 21101 and prior, a remote attacker can cause the FTP service to enter a denial-of-service condition dependent on the timing at which a remote attacker connects to the FTP server on the above CPU modules.

remediations

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

No vendor fix yet; a mitigation is available.

MitigationL02/06/26CPU L26CPU-BTcisa_csaf_ot
Mitsubishi Electric strongly recommends that users should operate the affected device behind a firewall.
MitigationL02/06/26CPU-CM L26CPU-BT-CMcisa_csaf_ot
Mitsubishi Electric strongly recommends that users should operate the affected device behind a firewall.
MitigationL02/06/26CPU-P L26CPU-PBTcisa_csaf_ot
Mitsubishi Electric strongly recommends that users should operate the affected device behind a firewall.
MitigationQ03/04/06/13/26UDVCPUcisa_csaf_ot
Mitsubishi Electric strongly recommends that users should operate the affected device behind a firewall.
MitigationQ03UDECPU Q04/06/10/13/20/26/50/100UDEHCPUcisa_csaf_ot
Mitsubishi Electric strongly recommends that users should operate the affected device behind a firewall.
MitigationQ04/06/13/26UDPVCPUcisa_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.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.3–7.5

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.2 · 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

v3.15.4mediumCVSS:3.1/AV:N/AC:H/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-400USprimaryCWE-400US

affected products (23)

Products and version ranges known to be affected.

L02/06/26CPU L26CPU-BT: serial number 21101 and priorall versionscisa_csaf_otUS
L02/06/26CPU-CM L26CPU-BT-CM: serial number 21101 and priorall versionscisa_csaf_otUS
L02/06/26CPU-P L26CPU-PBT: serial number 21101 and priorall versionscisa_csaf_otUS
Q03/04/06/13/26UDVCPU: serial number 21081 and priorall versionscisa_csaf_otUS
Q03UDECPU Q04/06/10/13/20/26/50/100UDEHCPU: serial number 21081 and priorall versionscisa_csaf_otUS
Q04/06/13/26UDPVCPU: serial number 21081 and priorall versionscisa_csaf_otUS
Mitsubishi Electric L02/06/26CPU L26CPU-BT≤ 21101cisa_csaf_otUS
Mitsubishi Electric L02/06/26CPU-CM L26CPU-BT-CM≤ 21101cisa_csaf_otUS
Mitsubishi Electric L02/06/26CPU-P L26CPU-PBT≤ 21101cisa_csaf_otUS
Mitsubishi Electric Q03/04/06/13/26UDVCPU≤ 21081cisa_csaf_otUS
Mitsubishi Electric Q03UDECPU Q04/06/10/13/20/26/50/100UDEHCPU≤ 21081cisa_csaf_otUS
Mitsubishi Electric Q04/06/13/26UDPVCPU≤ 21081cisa_csaf_otUS
n/a Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU: serial number 21081 and prior, Q04/06/13/26UDPVCPU: serial number 21081 and prior, and Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU: serial number 21081 and prior. MELSEC-L Series L02/06/26CPU, L26CPU-BT: serial number 21101 and prior, L02/06/26CPU-P, L26CPU-PBT: serial number 21101 and prior, and L02/06/26CPU-CM, L26CPU-BT-CM: serial number 21101 and prior.≤ Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU: serial number 21081 and prior, Q04/06/13/26UDPVCPU: serial number 21081 and prior, and Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU: serial number 21081 and prior. MELSEC-L Series L02/06/26CPU, L26CPU-BT: serial number 21101 and prior, L02/06/26CPU-P, L26CPU-PBT: serial number 21101 and prior, and L02/06/26CPU-CM, L26CPU-BT-CM: serial number 21101 and prior.enisa_euvdEU
mitsubishielectric l02/06/26cpu firmware≤ 21101nvdUScpe:2.3:o:mitsubishielectric:l02\/06\/26cpu_firmware:*:*:*:*:*:*:*:*
mitsubishielectric l02/06/26cpu-cm firmware≤ 21101nvdUScpe:2.3:o:mitsubishielectric:l02\/06\/26cpu-cm_firmware:*:*:*:*:*:*:*:*
mitsubishielectric l02/06/26cpu-p firmware≤ 21101nvdUScpe:2.3:o:mitsubishielectric:l02\/06\/26cpu-p_firmware:*:*:*:*:*:*:*:*
mitsubishielectric l26cpu-bt firmware≤ 21101nvdUScpe:2.3:o:mitsubishielectric:l26cpu-bt_firmware:*:*:*:*:*:*:*:*
mitsubishielectric l26cpu-bt-cm firmware≤ 21101nvdUScpe:2.3:o:mitsubishielectric:l26cpu-bt-cm_firmware:*:*:*:*:*:*:*:*
mitsubishielectric l26cpu-pbt firmware≤ 21101nvdUScpe:2.3:o:mitsubishielectric:l26cpu-pbt_firmware:*:*:*:*:*:*:*:*
mitsubishielectric q03/04/06/13/26udvcpu firmware≤ 21081nvdUScpe:2.3:o:mitsubishielectric:q03\/04\/06\/13\/26udvcpu_firmware:*:*:*:*:*:*:*:*

showing 20 of 23

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-19-311-01Mitsubishi Electric MELSEC-Q Series and MELSEC-L Series CPU Modules2019-11-07icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability may prevent the FTP client from connecting to the FTP server on MELSEC-Q Series and MELSEC-L Series CPU module.

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 2019-11-13modified 2026-06-17

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references (6)

External citations — patches, advisories, analysis.

scry

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