Auth bypass in Mitsubishielectric R08psfcpu
CVE-2021-20599
Cleartext Transmission of Sensitive InformationCleartext transmission of sensitive information vulnerability in MELSEC iQ-R series Safety CPU R08/16/32/120SFCPU firmware versions "26" and prior and MELSEC iQ-R series SIL2 Process CPU R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to login to a target CPU module by obtaining credentials other than password.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.014 (71.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Mitsubishielectric R08psfcpu
- Mitsubishielectric R08psfcpu Firmware
- Mitsubishielectric R08sfcpu
- Mitsubishielectric R08sfcpu Firmware
- Mitsubishielectric R120psfcpu
- Mitsubishielectric R120psfcpu Firmware
- Mitsubishielectric R120sfcpu
- Mitsubishielectric R120sfcpu Firmware
- Mitsubishielectric R16psfcpu
- Mitsubishielectric R16psfcpu Firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-011_en.pdf (vendor-advisory, Vendor Advisory)
- jvn.jp/vu/JVNVU98578731 (Third Party Advisory, government-resource)
- www.cisa.gov/uscert/ics/advisories/icsa-21-287-03 (government-resource)
Frequently asked questions
- What is CVE-2021-20599?
- CVE-2021-20599 is a critical-severity vulnerability in Mitsubishielectric R08psfcpu, classified under Cleartext Transmission of Sensitive Information. CVSS score: 9.1/10. Published 2021-10-14.
- How severe is CVE-2021-20599?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-20599 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.