Improper input validation in Mitsubishi Melipc Mi5122-Vw
CVE-2021-20611
Improper Input Validation vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU, MELSEC iQ-R Series R08/16/32/120SFCPU, MELSEC iQ-R Series R08/16/32/120PCPU, MELSEC iQ-R Series R08/16/32/120PSFCPU, MELSEC iQ-R Series R16/32/64MTCPU, MELSEC iQ-R Series R12CCPU-V, MELSEC Q Series Q03UDECPU, MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU, MELSEC Q Series Q03/04/06/13/26UDVCPU, MELSEC Q Series Q04/06/13/26UDPVCPU, MELSEC Q Series Q12DCCPU-V, MELSEC Q Series Q24DHCCPU-V(G), MELSEC Q Series Q24/26DHCCPU-LS, MELSEC Q Series MR-MQ100, MELSEC Q Series Q172/173DCPU-S1, MELSEC Q Series Q172/173DSCPU, MELSEC Q Series Q170MCPU, MELSEC Q Series Q170MSCPU(-S1), MELSEC L Series L02/06/26CPU(-P), MELSEC L Series L26CPU-(P)BT and MELIPC Series MI5122-VW allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.030 (85.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Mitsubishi Melipc_mi5122-vw
- Mitsubishi Melipc_mi5122-vw_firmware
- Mitsubishi Melsec_iq-r_r00_cpu
- Mitsubishi Melsec_iq-r_r00_cpu_firmware
- Mitsubishi Melsec_iq-r_r01_cpu
- Mitsubishi Melsec_iq-r_r01_cpu_firmware
- Mitsubishi Melsec_iq-r_r02_cpu
- Mitsubishi Melsec_iq-r_r02_cpu_firmware
- Mitsubishi Melsec_iq-r_r04_cpu
- Mitsubishi Melsec_iq-r_r04_cpu_firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (vendor-advisory, Vendor Advisory)
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (Third Party Advisory, government-resource)
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (US Government Resource, Third Party Advisory, government-resource)
Frequently asked questions
- What is CVE-2021-20611?
- CVE-2021-20611 is a high-severity vulnerability in Mitsubishi Melipc Mi5122-Vw, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-12-01.
- How severe is CVE-2021-20611?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-20611 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.