01 Record

CVE-2022-40267

Authentication Bypass Vulnerability in Web Server Function on MELSEC Series

MediumPUBLISHEDCNA: Mitsubishi

CNA base score5.9 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

View raw JSON

02 Description

Authentication Bypass Vulnerability in Web Server Function on MELSEC Series

03 Exploitation and scoring

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 65.6% of scored records. A rank, not a probability.

NVD base score

9.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2023-01-20 07:52Z3 YR AGO

Last updated

2024-08-03 12:14Z2 YR AGO

Reserved

2022-09-08

Assigning CNA

Mitsubishi

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weaknesses

CWE-337Predictable Seed in Pseudo-Random Number Generator (PRNG)Variant
CWE-335Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)Base

Data version

5.1

Document digest

d2d25732f2fffe80bdf5c59d4dd3e2ae405c7dc70ecf54e95c28a67753400322

05 Affected products

VendorProductVersionsPlatforms

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-32MT/ESserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-64MT/ESserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Seres FX5U-80MT/ESserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-32MR/ESserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-64MR/ESserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-80MR/ESserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-32MT/DSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-64MT/DSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-80MT/DSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-32MR/DSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-64MR/DSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-80MR/DSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-32MT/ESSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-64MT/ESSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-80MT/ESSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-32MT/DSSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-64MT/DSSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5U-80MT/DSSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UC-32MT/Dserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UC-64MT/Dserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UC-96MT/Dserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UC-32MT/DSSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UC-64MT/DSSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UC-96MT/DSSserial number 17X**** or later, and versions 1.280 and prior, serial number 179**** and prior, and versions 1.074 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UC-32MT/DS-TSversions 1.280 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UC-32MT/DSS-TSversions 1.280 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UC-32MR/DS-TSversions 1.280 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R00CPUversions 33 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R01CPUversions 33 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R02CPUversions 33 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R04CPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R08CPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R16CPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R32CPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R120CPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R04ENCPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R08ENCPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R16ENCPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R32ENCPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-R Series R120ENCPUversions 66 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-24MT/ES1.042 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-40MT/ES1.042 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-60MT/ES1.042 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-24MR/ES1.042 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-40MR/ES1.042 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-60MR/ES1.042 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-24MT/ESS1.042 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-40MT/ESS1.042 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-60MT/ESS1.042 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-24MT/ES-A1.043 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-40MT/ES-A1.043 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-60MT/ES-A1.043 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-24MR/ES-A1.043 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-40MR/ES-A1.043 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5UJ-60MR/ES-A1.043 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5S-30MT/ES1.003 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5S-40MT/ES1.003 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5S-60MT/ES1.003 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5S-80MT/ES1.003 and prior—

Mitsubishi Electric CorporationMELSEC iQ-F Series FX5S-30MR/ES1.003 and prior—

60 further entries not shown. The complete list is in the raw JSON document.

06 References

www.mitsubishielectric.comhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-019_en.pdf
jvn.jphttps://jvn.jp/vu/JVNVU99673580/index.html
www.cisa.govhttps://www.cisa.gov/uscert/ics/advisories/icsa-23-017-02
www.talosintelligence.comhttps://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1646

01 Record index

CVE-2022-40267

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2022-40267

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References