What’s Vulnerable › Vulnerabilities
CVE-2021-20586
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-01-29 · updated 2026-06-17
Description
Resource management errors vulnerability in a robot controller of MELFA FR Series(controller "CR800-*V*D" of RV-*FR***-D-* all versions, controller "CR800-*HD" of RH-*FRH***-D-* all versions, controller "CR800-*HRD" of RH-*FRHR***-D-* all versions, controller "CR800-*V*R with R16RTCPU" of RV-*FR***-R-* all versions, controller "CR800-*HR with R16RTCPU" of RH-*FRH***-R-* all versions, controller "CR800-*HRR with R16RTCPU" of RH-*FRHR***-R-* all versions, controller "CR800-*V*Q with Q172DSRCPU" of RV-*FR***-Q-* all versions, controller "CR800-*HQ with Q172DSRCPU" of RH-*FRH***-Q-* all versions, controller "CR800-*HRQ with Q172DSRCPU" of RH-*FRHR***-Q-* all versions) and a robot controller of MELFA CR Series(controller "CR800-CVD" of RV-8CRL-D-* all versions, controller "CR800-CHD" of RH-*CRH**-D-* all versions) as well as a cooperative robot ASSISTA(controller "CR800-05VD" of RV-5AS-D-* all versions) allows a remote unauthenticated attacker to cause a DoS of the execution of the robot program and the Ethernet communication by sending a large amount of packets in burst over a short period of time. As a result of DoS, an error may occur. A reset is required to recover it if the error occurs.
Affected products
- Mitsubishielectric Rh12Frh55 Firmware: all versions
- Mitsubishielectric Rh12Frh85 Firmware: all versions
- Mitsubishielectric Rh12Rfh70 Firmware: all versions
- Mitsubishielectric Rh1Frhr Firmware: all versions
- Mitsubishielectric Rh20Frh100 Firmware: all versions
- Mitsubishielectric Rh20Frh85 Firmware: all versions
- Mitsubishielectric Rh3Frh35 Firmware: all versions
- Mitsubishielectric Rh3Frh45 Firmware: all versions
- Mitsubishielectric Rh3Frh55 Firmware: all versions
- Mitsubishielectric Rh3Frhr Firmware: all versions
- Mitsubishielectric Rh6Frh35 Firmware: all versions
- Mitsubishielectric Rh6Frh45 Firmware: all versions
- Mitsubishielectric Rh6Frh55 Firmware: all versions
- Mitsubishielectric Rv13Fr Firmware: all versions
- Mitsubishielectric Rv13Frl Firmware: all versions
- Mitsubishielectric Rv13Frlm/C Firmware: all versions
- Mitsubishielectric Rv13Frm/C Firmware: all versions
- Mitsubishielectric Rv20Fr Firmware: all versions
- Mitsubishielectric Rv20Frm/C Firmware: all versions
- Mitsubishielectric Rv2Fr(B) Firmware: all versions
- Mitsubishielectric Rv2Fr Firmware: all versions
- Mitsubishielectric Rv2Frl(B) Firmware: all versions
- Mitsubishielectric Rv2Frl Firmware: all versions
- Mitsubishielectric Rv4Fr Firmware: all versions
- Mitsubishielectric Rv4Frl Firmware: all versions
- Mitsubishielectric Rv4Frlm/C Firmware: all versions
- Mitsubishielectric Rv4Frm/C Firmware: all versions
- Mitsubishielectric Rv7Fr Firmware: all versions
- Mitsubishielectric Rv7Frl Firmware: all versions
- Mitsubishielectric Rv7Frll Firmware: all versions
References
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-019_en.pdf
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-019_en.pdf
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