Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition
Published Oct 30, 2020
7.5
HIGHCVSS 3.1
EPSS 3.57%
Description
Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition .
Affected products
-
- Version R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier, Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, and L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versionsStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mitsubishi Electric Corporation | MELSEC iQ-R, Q and L series | n/a |
|
Configuration 1
- 22031
Running on/with
- n/a
Configuration 2
- 22031
Running on/with
- n/a
Configuration 3
- 22031
Running on/with
- n/a
Configuration 4
- 22031
Running on/with
- n/a
Configuration 5
- 22031
Running on/with
- n/a
Configuration 6
- 22031
Running on/with
- n/a
Configuration 7
- 22031
Running on/with
- n/a
Configuration 8
- 22031
Running on/with
- n/a
Configuration 9
- 22081
Running on/with
- n/a
Configuration 10
- 22081
Running on/with
- n/a
Configuration 11
- 22081
Running on/with
- n/a
Configuration 12
- 22081
Running on/with
- n/a
Configuration 13
- 22081
Running on/with
- n/a
Configuration 14
- 22081
Running on/with
- n/a
Configuration 15
- 22081
Running on/with
- n/a
Configuration 16
- 22081
Running on/with
- n/a
Configuration 17
- 22081
Running on/with
- n/a
Configuration 18
Running on/with
- n/a
Configuration 19
Running on/with
- n/a
Configuration 20
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- n/a
Configuration 21
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- n/a
Configuration 22
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- n/a
Configuration 23
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- n/a
Configuration 24
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- n/a
Configuration 25
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- n/a
Configuration 26
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- n/a
Configuration 27
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- n/a
Configuration 28
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- n/a
Configuration 29
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- n/a
Configuration 30
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- n/a
Configuration 31
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- n/a
Configuration 32
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- n/a
Configuration 33
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- n/a
Configuration 34
Running on/with
- n/a
Configuration 35
Running on/with
- n/a
Configuration 36
Running on/with
- n/a
Configuration 37
Running on/with
- n/a
Configuration 38
Running on/with
- n/a
Configuration 39
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- n/a
Configuration 40
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- n/a
Configuration 41
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- n/a
Configuration 42
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- n/a
Configuration 43
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- n/a
Configuration 44
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- n/a
Configuration 45
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- n/a
Configuration 46
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- n/a
Configuration 47
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- n/a
Configuration 48
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- n/a
Configuration 49
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- n/a
Configuration 50
Running on/with
- n/a
Configuration 51
Running on/with
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.57% (0.03572) | 88.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.53% (0.03529) | 87.71th | v5 (v2026.06.15) |
| Nov 21, 2025 | 2.97% (0.02972) | 86.01th | v4 (v2025.03.14) |
| Nov 18, 2025 | 0.31% (0.00308) | 51.05th | v4 (v2025.03.14) |
| Oct 17, 2025 | 2.77% (0.02769) | 85.45th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.26% (0.00264) | 47.92th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.33% (0.00333) | 71.45th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.33% (0.00333) | 70.38th | v3 (v2023.03.01) |
| Jul 15, 2023 | 0.33% (0.00333) | 67.25th | v3 (v2023.03.01) |
| May 10, 2023 | 0.29% (0.00293) | 64.54th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.28% (0.00283) | 63.58th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.74% (0.05736) | 77.22th | v2 (v2022.01.01) |
| Feb 3, 2022 | 5.58% (0.05581) | 80.18th | v1 |
| Jan 6, 2022 | 5.58% (0.05581) | 79.98th | v1 |
| Sep 1, 2021 | 1.30% (0.01300) | 69.44th | v1 |
| Apr 14, 2021 | 1.30% (0.01300) | 0.00th | v1 |
References (3)
- https://jvn.jp/vu/JVNVU96558207/index.html x_refsource_MISCThird Party Advisory
- https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-013.pdf x_refsource_MISCVendor Advisory
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-013_en.pdf x_refsource_MISCVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://jvn.jp/vu/JVNVU96558207/index.html | x_refsource_MISCThird Party Advisory | |
| https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-013.pdf | x_refsource_MISCVendor Advisory | |
| https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-013_en.pdf | x_refsource_MISCVendor Advisory |
Change history (0)
No recorded changes yet.