Auth bypass in Mitsubishielectric R08psfcpu
CVE-2021-20598
Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R08/16/32/120SFCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to lockout a legitimate user by continuously trying login with incorrect password.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.015 (73.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · 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
- jvn.jp/vu/JVNVU98578731/index.html (Third Party Advisory)
- www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-010_en.pdf (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-20598?
- CVE-2021-20598 is a medium-severity vulnerability in Mitsubishielectric R08psfcpu, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-08-06.
- How severe is CVE-2021-20598?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-20598 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.