CVE-2020-5668: Mitsubishielectric r00cpu Firmware
High severity, CVSS 7.5. EPSS: 4.9% chance of exploitation in the next 30 days.
Uncontrolled resource consumption vulnerability in MELSEC iQ-R Series modules (R00/01/02CPU firmware version '19' and earlier, R04/08/16/32/120 (EN) CPU firmware version '51' and earlier, R08/16/32/120SFCPU firmware version '22' and earlier, R08/16/32/120PCPU firmware version '25' and earlier, R08/16/32/120PSFCPU firmware version '06' and earlier, RJ71EN71 firmware version '47' and earlier, RJ71GF11-T2 firmware version '47' and earlier, RJ72GF15-T2 firmware version '07' and earlier, RJ71GP21-SX firmware version '47' and earlier, RJ71GP21S-SX firmware version '47' and earlier, and RJ71GN11-T2 firmware version '11' and earlier) allows a remote unauthenticated attacker to cause an error in a CPU unit and cause a denial-of-service (DoS) condition in execution of the program and its communication, or to cause a denial-of-service (DoS) condition in communication via the unit by receiving a specially crafted SLMP packet
Affected products
- Mitsubishielectric r00cpu Firmware: up to and including 19
- Mitsubishielectric r01cpu Firmware: up to and including 19
- Mitsubishielectric r02cpu Firmware: up to and including 19
- Mitsubishielectric r04cpu Firmware: up to and including 51
- Mitsubishielectric r08cpu Firmware: up to and including 51
- Mitsubishielectric r08pcpu Firmware: up to and including 25
- Mitsubishielectric r08psfcpu Firmware: up to and including 06
- Mitsubishielectric r08sfcpu Firmware: up to and including 22
- Mitsubishielectric r120cpu Firmware: up to and including 51
- Mitsubishielectric r120pcpu Firmware: up to and including 25
- Mitsubishielectric r120psfcpu Firmware: up to and including 06
- Mitsubishielectric r120sfcpu Firmware: up to and including 22
- Mitsubishielectric r16cpu Firmware: up to and including 51
- Mitsubishielectric r16pcpu Firmware: up to and including 25
- Mitsubishielectric r16psfcpu Firmware: up to and including 06
- Mitsubishielectric r16sfcpu Firmware: up to and including 22
- Mitsubishielectric r32cpu Firmware: up to and including 51
- Mitsubishielectric r32pcpu Firmware: up to and including 25
- Mitsubishielectric r32psfcpu Firmware: up to and including 06
- Mitsubishielectric r32sfcpu Firmware: up to and including 22
- Mitsubishielectric RJ71C24-r2 Firmware: up to and including 47
- Mitsubishielectric RJ71C24-r4 Firmware: up to and including 47
- Mitsubishielectric RJ71EN71 Firmware: up to and including 47
- Mitsubishielectric RJ71GF11-t2 Firmware: up to and including 47
- Mitsubishielectric RJ71GN11-t2 Firmware: up to and including 11
- and 3 more
Published 2020-11-20. Last modified 2026-06-17.