Mitsubishi MELSEC iQ-R Series PLCs with firmware 49 allow an unauthenticated attacker to…
Priority LOW 37CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.
Summary
Mitsubishi MELSEC iQ-R Series PLCs with firmware 49 allow an unauthenticated attacker to halt the industrial process by sending a crafted packet over the network. This denial of service attack exposes Improper Input Validation. After halting, physical access to the PLC is required in order to restore production, and the device state is lost. This is related to R04CPU, RJ71GF11-T2, R04CPU, and RJ71GF11-T2.
Why it matters now
EPSS 0.02143 82nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 38
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:mitsubishielectric:r00cpu_firmware:*:*:*:*:*:*:*:* | up to 20 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r00cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r01cpu_firmware:*:*:*:*:*:*:*:* | up to 20 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r01cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r02cpu_firmware:*:*:*:*:*:*:*:* | up to 20 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r02cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r04cpu_firmware:*:*:*:*:*:*:*:* | up to 52 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r04cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r08cpu_firmware:*:*:*:*:*:*:*:* | up to 52 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r08cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
- cpe:2.3:o:mitsubishielectric:r00cpu_firmware:*:*:*:*:*:*:*:* Versions up to 20 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r00cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r01cpu_firmware:*:*:*:*:*:*:*:* Versions up to 20 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r01cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r02cpu_firmware:*:*:*:*:*:*:*:* Versions up to 20 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r02cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r04cpu_firmware:*:*:*:*:*:*:*:* Versions up to 52 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r04cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r08cpu_firmware:*:*:*:*:*:*:*:* Versions up to 52 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r08cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
Show 28 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:mitsubishielectric:r16cpu_firmware:*:*:*:*:*:*:*:* | up to 52 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r16cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r32cpu_firmware:*:*:*:*:*:*:*:* | up to 52 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r32cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r120cpu_firmware:*:*:*:*:*:*:*:* | up to 52 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r120cpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r08sfcpu_firmware:*:*:*:*:*:*:*:* | up to 22 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r08sfcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r16sfcpu_firmware:*:*:*:*:*:*:*:* | up to 22 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r16sfcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r32sfcpu_firmware:*:*:*:*:*:*:*:* | up to 22 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r32sfcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r120sfcpu_firmware:*:*:*:*:*:*:*:* | up to 22 | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r120sfcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r08pcpu_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r08pcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r16pcpu_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r16pcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r32pcpu_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r32pcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r120pcpu_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r120pcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r16mtcpu_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r16mtcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r32mtcpu_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r32mtcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
| cpe:2.3:o:mitsubishielectric:r64mtcpu_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Mitsubishi Electric Europe B.V. |
| cpe:2.3:h:mitsubishielectric:r64mtcpu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mitsubishi Electric Europe B.V. |
- cpe:2.3:o:mitsubishielectric:r16cpu_firmware:*:*:*:*:*:*:*:* Versions up to 52 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r16cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r32cpu_firmware:*:*:*:*:*:*:*:* Versions up to 52 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r32cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r120cpu_firmware:*:*:*:*:*:*:*:* Versions up to 52 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r120cpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r08sfcpu_firmware:*:*:*:*:*:*:*:* Versions up to 22 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r08sfcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r16sfcpu_firmware:*:*:*:*:*:*:*:* Versions up to 22 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r16sfcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r32sfcpu_firmware:*:*:*:*:*:*:*:* Versions up to 22 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r32sfcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r120sfcpu_firmware:*:*:*:*:*:*:*:* Versions up to 22 Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r120sfcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r08pcpu_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r08pcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r16pcpu_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r16pcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r32pcpu_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r32pcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r120pcpu_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r120pcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r16mtcpu_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r16mtcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r32mtcpu_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r32mtcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
- cpe:2.3:o:mitsubishielectric:r64mtcpu_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Mitsubishi Electric Europe B.V.
- cpe:2.3:h:mitsubishielectric:r64mtcpu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mitsubishi Electric Europe B.V.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-16850
- 2026-10-03 Alias added: GHSA-47gg-jmh3-w48g
References
More Mitsubishi Electric Europe B.V. R00cpu Firmware vulnerabilities
- TI-2022-19113 Authentication Bypass Vulnerability in Web Server Function on MELSEC Series CVSS 3.1CRITICAL 9.1
- TI-2020-04633 Uncontrolled resource consumption in Mitsubishi Electric Corporation MELSEC iQ-R CVSS 3.1HIGH 7.5
- TI-2021-03824 Uncontrolled resource consumption in MELSEC iQ-R series CPU modules CVSS 3.1HIGH 7.5
- TI-2020-04497 Uncontrolled resource consumption in Mitsubishi Electric Corporation MELSOFT transmission… CVSS 3.1HIGH 7.5
Sources
- CVE-2020-16850 · CVE Program
- CVE-2020-16850 · NVD
- FIRST EPSS
- GHSA-47gg-jmh3-w48g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences