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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 2.37% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- mitsubishielectric/r08sfcpu firmware · mitsubishielectric/r16sfcpu firmware · mitsubishielectric/r32sfcpu firmware · mitsubishielectric/r120sfcpu firmware · mitsubishielectric/r08psfcpu firmware · mitsubishielectric/r16psfcpu firmware · mitsubishielectric/r32psfcpu firmware · mitsubishielectric/r120psfcpu firmware
- Source
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp
References
- https://jvn.jp/vu/JVNVU98578731/index.htmlThird Party Advisory
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-250-01
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-008_en.pdfVendor Advisory
- https://jvn.jp/vu/JVNVU98578731/index.htmlThird Party Advisory
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-250-01
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-008_en.pdfVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.