Description
Improper Validation of Specified Quantity in Input vulnerability in Mitsubishi Electric MELSEC iQ-R Series R08PCPU, R16PCPU, R32PCPU, and R120PCPU allows an unauthenticated attacker to read device data or part of a control program from the affected product, write device data in the affected product, or cause a denial of service (DoS) condition on the affected product by sending a specially crafted packet containing a specific command to the affected product.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mitsubishi Electric | MELSEC iQ-R Series R08PCPU | Firmware versions "48" and prior | — |
| Mitsubishi Electric | MELSEC iQ-R Series R16PCPU | Firmware versions "48" and prior | — |
| Mitsubishi Electric | MELSEC iQ-R Series R32PCPU | Firmware versions "48" and prior | — |
| Mitsubishi Electric | MELSEC iQ-R Series R120PCPU | Firmware versions "48" and prior | — |
Advisories 1
- ICSA-26-036-02 Mitsubishi Electric MELSEC iQ-R Series CISA ICS & IT advisories · Feb 5, 2026
References
- https://jvn.jp/vu/JVNVU95093080/ government-resource
- https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-020_en.pdf vendor-advisory
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-036-02 government-resource