Information disclosure in Mitsubishielectric R08psfcpu
CVE-2021-20594
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions "26" and prior and Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to acquire legitimate user names registered in the module via brute-force attack on user names.
Vulnerability class: Information Disclosure
Published · last modified .
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:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.024 (83.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · 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/2021-008_en.pdf (Vendor Advisory)
- www.cisa.gov/uscert/ics/advisories/icsa-21-250-01
Frequently asked questions
- What is CVE-2021-20594?
- CVE-2021-20594 is a high-severity vulnerability in Mitsubishielectric R08psfcpu, classified under Information Disclosure. CVSS score: 7.5/10. Published 2021-08-06.
- How severe is CVE-2021-20594?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-20594 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.